Back to today’s briefing

Story perspectives

Southwest Heatwave Soars 30°F Above Normal, Sparks Wildfire Risks

3/18/2026

29 2 Full Breakdown

Summary

Story summary

Phoenix is expected to exceed 100°F by Wednesday as a significant heatwave develops across the southwestern United States.
The heat is 20–30°F above normal and may foster wildfires in the eastern United States.
Heat advisories have been issued in California, with coastal areas around 90°F.
The heat threatens California's snowpack, which is crucial for the state's water supply.

1 of 1

Story summary

Phoenix is expected to exceed 100°F by Wednesday as a significant heatwave develops across the southwestern United States.
The heat is 20–30°F above normal and may foster wildfires in the eastern United States.
Heat advisories have been issued in California, with coastal areas around 90°F.
The heat threatens California's snowpack, which is crucial for the state's water supply.