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By Amanda Greenwood
Associate News Editor
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Millions of people across parts of California, Arizona, and Nevada have been advised to stay inside amid record-breaking temperatures on Thursday and into the weekend.
The National Weather Service (NWS) said some areas are expected to see "dangerously hot conditions," with temperatures expected to soar to 112 degrees Fahrenheit. The hottest days are likely to be Friday and Saturday.
The NWS forecasting office in Los Angeles warned that "more heat is on the way through Friday, especially in the valleys and lower mountains."
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Residents in affected areas in all three states have been advised to stay out of the sun, especially during the hottest parts of the day. They have also been urged to drink enough water, limit outdoor activity to the early morning or evening, and never leave pets or children in unattended vehicles as "car interiors will reach lethal temperatures in a matter of minutes."
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Areas Affected By The Heat This Weekend
The NWS has warned that extreme heat warnings are in place for multiple counties and regions across California, Arizona, and Nevada, including the following:
California
In parts of southern and southeast California, temperatures are likely to be over 30 degrees above the seasonal average from Thursday to Sunday.
This includes the Coachella Valley, which could reach 112F—with temperatures expected to peak on Friday. The San Gorgonio Pass, near Banning, could also see temperatures ranging between 98F and 106F.
The temperatures in San Diego county could reach 110F from Thursday until Saturday evening.
The NWS says temperatures may drop into the mid-to-low 70s overnight, providing some temporary relief.
Parts of southwest California could reach 104F through Thursday until Friday night.
The NWS warns that "the very young, the very old, those without air conditioning, and those active outdoors" are at risk of developing heat-related illnesses—especially those residing in mountain or foothill locations.
Parts of central and southcentral California, including Santa Barbara and the San Luis Obispo, Santa Ynez, Santa Lucia, and the Interior Mountains, could see temperatures reaching 100F until Friday night.
Arizona
Parts of southern, southcentral, and southwest Arizona could see temperatures climb to around 109F until Sunday night.
Temperatures reaching 107F could blast the northwest and eastern valleys of Phoenix, the central and northern parts of Phoenix, Buckeye, Avondale, Deer Valley, Glendale, Scottsdale, Paradise Valley, South Mountain, Ahwatukee, the southeast Valley, and Queen Creek until Sunday.
Apache Junction, Gold Canyon, Cave Creek, New River, Dripping Springs, Fountain Hills, East Mesa, New River Mesa, Rio Verde, Salt River, and Superior are likely to see temperatures ranging between 100F and 106F from Thursday through to Sunday.
In northern Arizona, the lower areas below 4,000 feet in the Grand Canyon are expected to reach 100F, especially at Phantom Ranch.
The NWS has told tourists and hikers that they should be out of the canyon between 10 a.m. and 4 p.m. due to the "dangerously hot conditions."
It says that "most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure."
Nevada
Parts of southern Nevada are likely to see temperatures around 30 degrees above average for this time of year until Sunday, meaning those who are not used to high temperatures are at risk.
What To Do In Extreme Heat
The NWS advises everyone in all affected areas to be vigilant and familiarize themselves with the signs and symptoms of heatstroke, as the extreme heat could cause heat cramps and heat exhaustion. If someone develops heatstroke, they should call 911.
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