US’ Phoenix Breaks Heat Record With 113 Days Straight Over 100 Fahrenheit

The desert city of Phoenix, Arizona, suffered a record 113 straight days with temperatures over 100 Fahrenheit (38 Celsius) this year, leading to hundreds of heat-related deaths and more acres burned by wildfire across the state, officials said.

The city of 1.6 million residents, the largest in the Sonoran desert, had its hottest-ever summer, breaking the previous 2023 record by nearly two degrees, according to the National Weather Service.

The 113-day streak reached last week smashed Phoenix’s previous record of 76-straight-days over 100 F set in 1993.

“It’s very rare that we see, especially two summers in a row, two record breaking summers like we just experienced,” said Matt Salerno, meteorologist at the National Weather Service Phoenix office.

Heat has killed 256 people so far this year in Phoenix’s Maricopa County and is the suspected cause of 393 other deaths, according to official data. That puts the county on track to surpass a record 645 heat deaths in 2023.

Around half of deaths are of unsheltered people, the county’s most vulnerable group.

Deaths peaked in July when Phoenix had regular highs of 118 F, a trend climate scientists attribute to global warming from fossil fuel pollution.

Over the last five years the city has averaged 40 days of 110 degrees or higher compared with about five days in that range at the beginning of the last century, according to the Arizona State Climate Office.

The extreme heat has led to a statewide increase in acreage burned by wildfire in 2024 compared with last year, according to the office’s director Erinanne Saffell.

A climate-related combination of record winter precipitation and summer heat fueled wildfires around Los Angeles in recent weeks.

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