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US March Temperature Record Broken in Arizona's Yuma Desert

An intense winter heat wave pushed temperatures 20–30 degrees above normal, setting a March record of 110°F near Martinez Lake, Arizona, the National Weather Service said.

  • On Thursday, March 19, Martinez Lake, Arizona, reached 110°F, setting a new national record for the highest March temperature ever recorded in the United States.
  • A high-pressure system spinning across the West is causing "an expansive dome of unusually hot temperatures," according to the National Weather Service Weather Prediction Center, driving the unseasonable heatwave.
  • Phoenix reached 105°F on Thursday, marking its earliest triple-digit day, while Las Vegas hit 95°F, topping its previous record of 94°F.
  • Authorities issued an Extreme Heat Warning for areas below 4,000 feet, and hiking trails at Camelback Mountain closed Thursday due to heat illness risks.
  • Temperatures will remain 20 to 30 degrees above normal through the weekend in the Southwest before dropping slightly starting Sunday, according to forecasters.
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Reports reveal that the western United States is experiencing a severe heatwave despite it being winter, with temperatures soaring to 43.3 degrees Celsius, breaking the March record. Scientists point to this as a sign of global warming.

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By Chris Dolce, CNN. An unprecedented heat wave in the West is poised to break the record for the highest March temperature ever recorded anywhere in the United States: 42°C (108°F). It's an alarming sign of just how hot the planet is getting and how fast it's happening. A weather station near Martinez Lake, Arizona, recorded a high of 43°C (110°F) Thursday afternoon, which some media outlets reported as the record. However, that weather station…

·Idaho Falls, United States
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Las Vegas Review-Journal broke the news in Las Vegas, United States on Friday, March 20, 2026.
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