Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

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Last Map Update: Sat, Aug 1, 2026 at 10:46:10 pm PDT

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

Extreme Heat Warning

Heat Advisory

Small Craft Advisory

Air Quality Alert

High Temperatures Saturday

Valley Heat Wave

Elevated Fire Danger through Early Next Week

High Temperatures on Satuday, August 1st saw values range from 100 to 108 with a few adjacent higher elevation locations in the upper 90s. Across the Kern County Desert, 107 to 110 degrees was more common. Sunday will see similar conditions with values a degree warmer they those observed this Saturday.

High pressure building over central California into the weekend will lead to warmer temperatures across the region, especially in the San Joaquin Valley where highs will top from 102 to 107 degrees. These conditions will place Heat Risk in the Moderate to locally Major Categories during the weekend. Remember that while moderate heat risk will affect those sensitive to the heat, major risk can affect much of the population - especially those without effective cooling or hydration with heat-related illnesses.

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Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

NWS Forecast Office Hanford, CA