National Weather Service United States Department of Commerce

Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

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Last Map Update: Tue, Aug 4, 2026 at 2:10:18 pm PDT

⚠️Heat Advisory in effect from 10 AM to 10 PM Tuesday for the interior East Bay Hills and Valleys and Santa Clara Valley and Eastern Hills with high temperatures in the 90s to low 100s. Moderate HeatRisk is expected across much of the interior today. Stay hydrated, limit time outdoors during peak heating, do not leave children or pets unattended in vehicles. #CAwx
Elevated fire weather concerns are expected across the interior this week due to near critically dry conditions and above normal temperatures. The driest conditions will be observed across the interior Central Coast and across the higher terrain.

 

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