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Unseasonal Heatwave Sets New March Temperature Record in Western US

opinion-review · 2026-03-20

An intense heatwave affected the western United States, with record temperatures occurring despite it being late winter. On Thursday, a location near Martinez Lake in Arizona's Yuma Desert recorded 43.3 degrees Celsius, surpassing the previous national high for March, which was 42.2 degrees in Texas. This event highlights unusual weather patterns in the region.

Key facts

  • A heatwave hit the western US at the end of winter
  • A site in Arizona reached 43.3°C on Thursday
  • This broke the US record for March temperatures
  • The previous record was 42.2°C in Texas
  • The temperature was measured near Martinez Lake in the Yuma Desert

Entities

Locations

  • United States
  • Arizona
  • Yuma Desert
  • Martinez Lake
  • Texas
  • Rio Grande City

Sources