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Heat Wave Triggers Warnings, Drives Half of Wildfire Acreage

7/31/2026

Summary

US Officials Warn

U.S. officials said a severe heat wave began Friday, prompting extreme-heat warnings; the National Weather Service forecast Saturday highs of 95-110°F, 115°F in Antelope Valley and near 120°F.
U.S. Forest Service meteorologist Kristen Stewart warned of heightened wildfire risk Friday through Sunday.
Experts warned that extreme heat can worsen heart and lung conditions and urged residents to stay hydrated, use air-conditioned spaces, and never leave children or pets in vehicles.

Summary

Kalashnikov Links Heatwaves

Researchers led by Dmitri Kalashnikov found heat waves—at least three consecutive days above the 90th percentile—caused nearly half of United States summer wildfire acreage burned from 2001-2024.
These patterns historically made up 15% or less of the warm season but are increasing.
The analysis warns that heat waves dry fuels, raise nighttime temperatures and promote lightning, raising ignition risk and prompting stricter fire-prevention measures as humidity strains firefighting resources.

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US Officials Warn

U.S. officials said a severe heat wave began Friday, prompting extreme-heat warnings; the National Weather Service forecast Saturday highs of 95-110°F, 115°F in Antelope Valley and near 120°F.
U.S. Forest Service meteorologist Kristen Stewart warned of heightened wildfire risk Friday through Sunday.
Experts warned that extreme heat can worsen heart and lung conditions and urged residents to stay hydrated, use air-conditioned spaces, and never leave children or pets in vehicles.

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