Arizona desert town breaks record for hottest March temperature in US history
Martinez Lake, Arizona, recorded 110°F on Thursday, breaking the US record for the hottest March temperature ever. This occurred during a late-winter heatwave affecting the southwestern US.

Briefing Summary
AI-generatedMartinez Lake, Arizona, recorded 110°F on Thursday, breaking the US record for the hottest March temperature ever. This occurred during a late-winter heatwave affecting the southwestern US. The previous record was 108°F, set in Texas in 1954 and tied in California earlier in the week. Numerous locations in California also reached 108°F, and Thermal, California, was forecast to potentially tie the new record. The heatwave caused record highs in cities including Phoenix and Las Vegas, with temperatures 20-30 degrees Fahrenheit above normal for March. Phoenix experienced its earliest triple-digit temperature day, and hiking trails were closed due to heat illness risks.
Article analysis
Model · rule-basedKey claims
5 extractedPhoenix reached 105F (40.6C), surpassing the previous record of 102F (38.9C) set on Wednesday.
The previous record of 108F (42.2C) had been set in Rio Grande City, Texas, in 1954.
Martinez Lake, Arizona, reached 110F (43.3C) on Thursday, breaking the record for the highest March temperature ever recorded in the US.
Global heating has made the type of heatwave seen this week four times more likely over the past decade.
This week’s scorching weather would have been “virtually impossible” without the climate crisis.