Record-breaking heat wave intensifies across the Southwest

A late-season heat wave is setting new records across the Southwest, with Phoenix hitting 117 degrees, its highest September temperature on record.

Ian Livingston reports for The Washington Post.


In short:

  • Phoenix hit a September record of 117 degrees, with temperatures expected to remain 15 to 25 degrees above normal.
  • Excessive heat warnings are in place across Arizona, Nevada and California, with highs extending into the 110-120 degree range in some desert areas.
  • The heat is also fueling fire risks, with conditions intensifying blazes near Los Angeles.

Why this matters:

As human-caused climate change accelerates, heat waves are becoming more frequent and severe, increasing health risks and fire dangers across the western U.S. This prolonged heat further strains water resources and energy grids.

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