‘Dangerously hot conditions’: millions in US west prepare for extreme heatwave

The Guardian US News
by Gloria Oladipo
March 16, 2026
3 min read

Quick Insights

The Bottom Line

Millions across western U.S. face extreme February heatwave with 90-degree temperatures.

How This Affects You

Power grids may be strained and you face serious health risks from unprecedented winter heat.

AI Summary

Millions of people across California, Nevada and Arizona are bracing for an extreme heatwave as the National Weather Service issued heat warnings throughout the western United States. The weather service issued heat advisories for California's Bay Area and central coast regions, with temperatures expected to reach up to 90°F in areas typically much cooler this time of year. The unprecedented February heat is particularly dangerous because residents and infrastructure are unprepared for such extreme temperatures during what should be winter months. Record-high temperatures are forecast across the three-state region, creating hazardous conditions that could strain power grids and pose serious health risks. The unusual timing of the heatwave underscores the increasing frequency of extreme weather events hitting the American West.

What's Being Done

The National Weather Service issued heat warnings throughout California, Nevada and Arizona.

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