These Counties Are Projected to Have the Most Extreme Heat in 2050

Climate change and global warming are nothing new—though, some are still in denial of the existence and negative impacts of these phenomena. Though the media lives for hyping up big weather phenomena, actual scientific research and data reveal the earth is, in fact, heating up at an alarming rate. Much of global warming is the product of greenhouse gas emissions caused by humans and their activities. In the 20th century, the world saw a 1.44-degree Fahrenheit increase in its mean surface temp. Since the 1970s, summer temperatures have been on a steady climb, increasing 0.4 degrees every 10 years in the U.S. and 2 degrees overall.

Not all areas are equal in terms of climate change. In the U.S., the fastest-warming regions are in Southern California and western Nevada, rising as much as 1.32 degrees Fahrenheit per decade and 5 degrees overall. Stacker put together a list of 50 U.S. counties projected to have the most extreme heat days in 2050 with data taken from the Centers for Disease Control and Prevention. These predictions were last updated in December of 2018. Extreme heat days are defined as days in which the max temperature hits above 100 or 90 Fahrenheit. The counties are ranked by the projected number of 100-degree days under a low emissions scenario with ties broken by 90-degree days under the same scenario. Keep reading to find out if your county, or a county near you, was hot enough to make the list.

You may also like: 50 common weather terms, explained

Wellington, TX
Google Maps

49. Collingsworth County, Texas (tie)

Projected 100° days in 2050:
- Low emissions scenario: 40 days (+8 days from 2016)
- High emissions scenario: 47 days (+15 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 117 days (+16 days from 2016)
- High emissions scenario: 123 days (+22 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 16 nights
- High emissions scenario: 26 nights

49. Childress County, Texas (tie)

Projected 100° days in 2050:
- Low emissions scenario: 40 days (+1 days from 2016)
- High emissions scenario: 47 days (+8 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 117 days (+8 days from 2016)
- High emissions scenario: 123 days (+14 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 26 nights
- High emissions scenario: 39 nights

48. Cottle County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 41 days (+1 days from 2016)
- High emissions scenario: 48 days (+8 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 121 days (+13 days from 2016)
- High emissions scenario: 127 days (+19 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 24 nights
- High emissions scenario: 36 nights

47. Hardeman County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 42 days (+2 days from 2016)
- High emissions scenario: 48 days (+8 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 117 days (+3 days from 2016)
- High emissions scenario: 123 days (+9 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 36 nights
- High emissions scenario: 49 nights

46. Baylor County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 42 days (-1 days from 2016)
- High emissions scenario: 49 days (+6 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 121 days (+10 days from 2016)
- High emissions scenario: 127 days (+16 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 35 nights
- High emissions scenario: 48 nights

Haskell, TX
Robert Daemmrich Photography Inc/Getty

45. Haskell County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 42 days (+4 days from 2016)
- High emissions scenario: 48 days (+10 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 129 days (+15 days from 2016)
- High emissions scenario: 135 days (+21 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 41 nights
- High emissions scenario: 54 nights

44. Brooks County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 42 days (+24 days from 2016)
- High emissions scenario: 53 days (+35 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 173 days (+38 days from 2016)
- High emissions scenario: 182 days (+47 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 86 nights
- High emissions scenario: 106 nights

43. Archer County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 43 days (+5 days from 2016)
- High emissions scenario: 48 days (+10 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 118 days (+12 days from 2016)
- High emissions scenario: 122 days (+16 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 43 nights
- High emissions scenario: 55 nights

42. Winkler County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 43 days (+2 days from 2016)
- High emissions scenario: 52 days (+11 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 141 days (+20 days from 2016)
- High emissions scenario: 149 days (+28 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 19 nights
- High emissions scenario: 31 nights

41. Cotton County, Oklahoma

Projected 100° days in 2050:
- Low emissions scenario: 44 days (+12 days from 2016)
- High emissions scenario: 50 days (+18 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 117 days (+11 days from 2016)
- High emissions scenario: 121 days (+15 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 33 nights
- High emissions scenario: 44 nights

Guthrie, TX
Rick Gershon/Getty

40. King County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 45 days (+4 days from 2016)
- High emissions scenario: 52 days (+11 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 128 days (+17 days from 2016)
- High emissions scenario: 134 days (+23 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 18 nights
- High emissions scenario: 29 nights

39. Shasta County, California

Projected 100° days in 2050:
- Low emissions scenario: 46 days (+25 days from 2016)
- High emissions scenario: 52 days (+31 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 106 days (+16 days from 2016)
- High emissions scenario: 110 days (+20 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 12 nights
- High emissions scenario: 17 nights

38. Tehama County, California

Projected 100° days in 2050:
- Low emissions scenario: 46 days (+10 days from 2016)
- High emissions scenario: 52 days (+16 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 110 days (+14 days from 2016)
- High emissions scenario: 114 days (+18 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 8 nights
- High emissions scenario: 13 nights

37. Madera County, California

Projected 100° days in 2050:
- Low emissions scenario: 46 days (-20 days from 2016)
- High emissions scenario: 53 days (-13 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 116 days (+6 days from 2016)
- High emissions scenario: 120 days (+10 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 4 nights
- High emissions scenario: 6 nights

36. Greer County, Oklahoma

Projected 100° days in 2050:
- Low emissions scenario: 46 days (+19 days from 2016)
- High emissions scenario: 52 days (+25 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 118 days (+12 days from 2016)
- High emissions scenario: 123 days (+17 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 27 nights
- High emissions scenario: 38 nights

Oklahoma Sign
pabradyphoto/Getty

35. Tillman County, Oklahoma

Projected 100° days in 2050:
- Low emissions scenario: 46 days (+9 days from 2016)
- High emissions scenario: 51 days (+14 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 119 days (+8 days from 2016)
- High emissions scenario: 123 days (+12 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 35 nights
- High emissions scenario: 47 nights

34. Jackson County, Oklahoma

Projected 100° days in 2050:
- Low emissions scenario: 46 days (+8 days from 2016)
- High emissions scenario: 52 days (+14 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 120 days (+7 days from 2016)
- High emissions scenario: 125 days (+12 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 31 nights
- High emissions scenario: 42 nights

33. Tulare County, California

Projected 100° days in 2050:
- Low emissions scenario: 46 days (-44 days from 2016)
- High emissions scenario: 54 days (-36 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 122 days (-3 days from 2016)
- High emissions scenario: 126 days (+1 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 7 nights
- High emissions scenario: 11 nights

31. Foard County, Texas (tie)

Projected 100° days in 2050:
- Low emissions scenario: 46 days (-3 days from 2016)
- High emissions scenario: 53 days (+4 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 124 days (+11 days from 2016)
- High emissions scenario: 129 days (+16 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 37 nights
- High emissions scenario: 50 nights

Hanford, California
David Crockett Photo/Getty

31. Kings County, California (tie)

Projected 100° days in 2050:
- Low emissions scenario: 46 days (-50 days from 2016)
- High emissions scenario: 53 days (-43 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 124 days (-3 days from 2016)
- High emissions scenario: 128 days (+1 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 6 nights
- High emissions scenario: 9 nights

30. Wichita County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 47 days (+12 days from 2016)
- High emissions scenario: 52 days (+17 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 120 days (+14 days from 2016)
- High emissions scenario: 124 days (+18 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 45 nights
- High emissions scenario: 57 nights

29. Wilbarger County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 47 days (+1 days from 2016)
- High emissions scenario: 53 days (+7 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 127 days (+9 days from 2016)
- High emissions scenario: 130 days (+12 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 43 nights
- High emissions scenario: 56 nights

28. Stonewall County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 47 days (+1 days from 2016)
- High emissions scenario: 54 days (+8 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 129 days (+11 days from 2016)
- High emissions scenario: 134 days (+16 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 25 nights
- High emissions scenario: 39 nights

27. McMullen County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 47 days (-6 days from 2016)
- High emissions scenario: 57 days (+4 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 166 days (+32 days from 2016)
- High emissions scenario: 172 days (+38 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 76 nights
- High emissions scenario: 93 nights

26. Harmon County, Oklahoma

Projected 100° days in 2050:
- Low emissions scenario: 48 days (+13 days from 2016)
- High emissions scenario: 55 days (+20 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 125 days (+15 days from 2016)
- High emissions scenario: 130 days (+20 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 21 nights
- High emissions scenario: 32 nights

Knox County
BOB WESTON/Getty

25. Knox County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 48 days (+1 days from 2016)
- High emissions scenario: 54 days (+7 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 134 days (+19 days from 2016)
- High emissions scenario: 139 days (+24 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 36 nights
- High emissions scenario: 50 nights

24. Graham County, Arizona

Projected 100° days in 2050:
- Low emissions scenario: 50 days (+24 days from 2016)
- High emissions scenario: 60 days (+34 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 140 days (+36 days from 2016)
- High emissions scenario: 146 days (+42 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 12 nights
- High emissions scenario: 19 nights

23. Washington County, Utah

Projected 100° days in 2050:
- Low emissions scenario: 53 days (+27 days from 2016)
- High emissions scenario: 62 days (+36 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 122 days (+28 days from 2016)
- High emissions scenario: 126 days (+32 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 12 nights
- High emissions scenario: 17 nights

22. Fresno County, California

Projected 100° days in 2050:
- Low emissions scenario: 54 days (-29 days from 2016)
- High emissions scenario: 62 days (-21 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 125 days (+3 days from 2016)
- High emissions scenario: 128 days (+6 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 9 nights
- High emissions scenario: 13 nights

21. Ward County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 54 days (+4 days from 2016)
- High emissions scenario: 64 days (+14 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 154 days (+30 days from 2016)
- High emissions scenario: 162 days (+38 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 20 nights
- High emissions scenario: 34 nights

Loving County
Robert Nickelsberg/Getty

20. Loving County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 55 days (+3 days from 2016)
- High emissions scenario: 64 days (+12 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 150 days (+26 days from 2016)
- High emissions scenario: 158 days (+34 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 12 nights
- High emissions scenario: 23 nights

19. Riverside County, California

Projected 100° days in 2050:
- Low emissions scenario: 56 days (+24 days from 2016)
- High emissions scenario: 63 days (+31 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 129 days (+24 days from 2016)
- High emissions scenario: 133 days (+28 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 14 nights
- High emissions scenario: 17 nights

18. Kern County, California

Projected 100° days in 2050:
- Low emissions scenario: 58 days (-28 days from 2016)
- High emissions scenario: 65 days (-21 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 126 days (0 days from 2016)
- High emissions scenario: 130 days (+4 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 30 nights
- High emissions scenario: 36 nights

17. Presidio County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 58 days (+44 days from 2016)
- High emissions scenario: 66 days (+52 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 149 days (+50 days from 2016)
- High emissions scenario: 157 days (+58 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 34 nights
- High emissions scenario: 46 nights

16. Dimmit County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 58 days (-5 days from 2016)
- High emissions scenario: 68 days (+5 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 171 days (+37 days from 2016)
- High emissions scenario: 178 days (+44 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 92 nights
- High emissions scenario: 107 nights

Nye County
Jacob Boomsma/Getty

15. Nye County, Nevada

Projected 100° days in 2050:
- Low emissions scenario: 60 days (+19 days from 2016)
- High emissions scenario: 67 days (+26 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 124 days (+23 days from 2016)
- High emissions scenario: 129 days (+28 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 15 nights
- High emissions scenario: 20 nights

14. Maverick County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 60 days (-2 days from 2016)
- High emissions scenario: 70 days (+8 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 167 days (+32 days from 2016)
- High emissions scenario: 174 days (+39 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 95 nights
- High emissions scenario: 109 nights

13. La Salle County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 60 days (+2 days from 2016)
- High emissions scenario: 70 days (+12 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 173 days (+38 days from 2016)
- High emissions scenario: 181 days (+46 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 87 nights
- High emissions scenario: 103 nights

12. Reeves County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 68 days (+15 days from 2016)
- High emissions scenario: 78 days (+25 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 162 days (+35 days from 2016)
- High emissions scenario: 171 days (+44 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 15 nights
- High emissions scenario: 27 nights

11. Zapata County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 73 days (+12 days from 2016)
- High emissions scenario: 86 days (+25 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 189 days (+53 days from 2016)
- High emissions scenario: 196 days (+60 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 102 nights
- High emissions scenario: 119 nights

Starr County
Robert Nickelsberg/Getty

10. Starr County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 73 days (+15 days from 2016)
- High emissions scenario: 86 days (+28 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 195 days (+55 days from 2016)
- High emissions scenario: 203 days (+63 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 102 nights
- High emissions scenario: 120 nights

9. Pima County, Arizona

Projected 100° days in 2050:
- Low emissions scenario: 75 days (+37 days from 2016)
- High emissions scenario: 85 days (+47 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 164 days (+53 days from 2016)
- High emissions scenario: 169 days (+58 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 43 nights
- High emissions scenario: 53 nights

8. Mohave County, Arizona

Projected 100° days in 2050:
- Low emissions scenario: 79 days (+12 days from 2016)
- High emissions scenario: 86 days (+19 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 145 days (+26 days from 2016)
- High emissions scenario: 149 days (+30 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 57 nights
- High emissions scenario: 62 nights

7. Webb County, Texas

Projected 100° days in 2050:
- Low emissions scenario: 79 days (+27 days from 2016)
- High emissions scenario: 91 days (+39 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 189 days (+53 days from 2016)
- High emissions scenario: 195 days (+59 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 115 nights
- High emissions scenario: 129 nights

6. Clark County, Nevada

Projected 100° days in 2050:
- Low emissions scenario: 88 days (+25 days from 2016)
- High emissions scenario: 95 days (+32 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 147 days (+35 days from 2016)
- High emissions scenario: 151 days (+39 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 51 nights
- High emissions scenario: 59 nights

Pinal County
BOB WESTON/Getty

5. Pinal County, Arizona

Projected 100° days in 2050:
- Low emissions scenario: 111 days (+35 days from 2016)
- High emissions scenario: 118 days (+42 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 180 days (+49 days from 2016)
- High emissions scenario: 184 days (+53 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 64 nights
- High emissions scenario: 72 nights

4. Maricopa County, Arizona

Projected 100° days in 2050:
- Low emissions scenario: 115 days (+24 days from 2016)
- High emissions scenario: 122 days (+31 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 182 days (+47 days from 2016)
- High emissions scenario: 186 days (+51 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 77 nights
- High emissions scenario: 84 nights

3. La Paz County, Arizona

Projected 100° days in 2050:
- Low emissions scenario: 120 days (+28 days from 2016)
- High emissions scenario: 124 days (+32 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 181 days (+46 days from 2016)
- High emissions scenario: 184 days (+49 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 84 nights
- High emissions scenario: 90 nights

2. Imperial County, California

Projected 100° days in 2050:
- Low emissions scenario: 127 days (+15 days from 2016)
- High emissions scenario: 131 days (+19 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 192 days (+52 days from 2016)
- High emissions scenario: 195 days (+55 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 76 nights
- High emissions scenario: 82 nights

Yuma County
Cheri Alguire/Getty

1. Yuma County, Arizona

Projected 100° days in 2050:
- Low emissions scenario: 132 days (+29 days from 2016)
- High emissions scenario: 136 days (+33 days from 2016)

Projected 90° days in 2050:
- Low emissions scenario: 194 days (+55 days from 2016)
- High emissions scenario: 197 days (+58 days from 2016)

Projected extreme heat nights (75°+) in 2050:
- Low emissions scenario: 98 nights
- High emissions scenario: 104 nights

You may also like: Cities Facing the Biggest Revenue Losses Due to COVID-19