"I expected Elsa from 'Frozen' to walk out any minute singing 'Let It Go,'" one person commented.
The U.S. reported the hottest December on record with an average temperature of 39.3 degrees, 6.7 degrees higher than the average temperature.
"It will probably also turn out to be the warmest winter month, period," a climatologist said.
Earlier this week, Los Angeles had a record amount of rainfall, with 2.16 inches of rain, breaking a previous record set in 1888.
La Niña and El Niño are known as the El Niño-Southern Oscillation (ENSO) cycle. Episodes of both typically last nine to 12 months.
Excessive Heat Warnings have been issued in several parts of the country, including New York City, Portland, Seattle and other major metropolitan areas.
The U.S. has been in the grip of its own heatwave, with temperatures soaring to 128 degrees Fahrenheit at Death Valley, California, on June 17
The measurement was taken by a weather station located near the summit of the Greenland Ice Sheet.
Areas of Siberia have seen temperatures hit the early to mid-thirties during an exceptional May heatwave.
Australia's summers are getting longer and hotter, raising serious questions.
"It appears one vehicle ran the other off the highway," Calhoun County Sheriff Matthew Saxton told Newsweek of chase Michigan man and woman allegedly took deputies on during brutal cold spell around midnight on Thursday.
In an attempt to be either funny or ironic, President Donald Trump started his Sunday by launching into several Twitter rants, including a thinly veiled, recycled punchline directed at the scientific community that compared a massive U.S. cold front and "Global Warming."
Patricia Espinosa said this year's extreme weather events "make the evidence clear that climate change is having an impact on the daily lives of people."
Countries such as Latvia and Lithuania have declared a state of emergency amid a scorching heat wave.
This map clearly shows just how much temperatures are diverging from the average for this time of year.
Decades of climate research could be wrong, meaning we're in a much worse situation than previously thought.
Temperatures are unlikely to set a new peak in 2017 after the El Nino faded.
The sticking points have been finance, pace and ambition.
Record high temperatures are happening more frequently across the globe.