Record Heat Sweeps Across U.S. Southwest and Mexico
• Record heat struck the U.S. Southwest and Mexico on March 20, 2026, with temperatures exceeding 104°F in many areas.
• A persistent high-pressure system, bringing dry air and clear skies, is driving the heatwave, which is expected to move eastward.
• Residents are advised to stay hydrated, seek air-conditioned environments, and limit outdoor activities to avoid heat-related illnesses.
Severe heatwave hits southwestern US and Mexico
On March 20, 2026, the southwestern United States and parts of Mexico experienced a severe heatwave, breaking numerous temperature records. NASA's Earth Observatory data, using the GEOS-FP model, showed temperatures surpassing 104°F (40°C) in many areas, with Yuma, Arizona, reaching an unprecedented 109°F. Other locations in Arizona and California recorded temperatures as high as 112°F (44°C).
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