Extreme Heat Across the Southern U.S.; Severe Thunderstorms and Heavy Rain in the Plains and Mississippi Valley

A heat wave over the Southwest will intensify late week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms and heavy rain are expected over portions of the Plains and Mississippi Valley tonight, which will shift to parts of the Upper Midwest and mid-Mississippi Valley Friday. Monsoonal showers and flooding persist in the Desert Southwest. Read More >

Click a location below for detailed forecast.

Last Map Update: Fri, Jul 31, 2026 at 3:58:22 am PDT

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

National Weather Service San Joaquin Valley, CA

Extreme Heat Warning

Gale Warning

Heat Advisory

Small Craft Advisory

Beach Hazards Statement

High Temperature Forecast

100°F Probabilities

HeatRisk Forecast

Elevated Fire Weather Conditions

Heat & Fire Safety

A look at the forecast high temperatures around the region for today, Friday July 31, 2026.

A look at the most recent probabilities of select locations reaching 100°F the next 7 days. Northern Sacramento Valley locations stand the best chances today, then as we move into the weekend, higher probabilities move into the rest of the Valley.

Widespread Moderate HeatRisk, with isolated areas of Major HeatRisk (Monday) are in the forecast for the next several days. Be sure to practice heat safety, drink plenty of water, check on those most sensitive to heat, and wear sunscreen.

Elevated Fire Weather Conditions exist today through Monday of next week. Low daytime humidity values, locally breezy winds, and hot conditions will lead to easier fire starts across the northern Sacramento Valley, Burney Basin, and Foothills of the Sierra.

Hot days are in the forecast! Hot temperatures, and low daytime humidity values will also lead to elevated fire weather conditions later in the week. Take some time to review these safety tips for hot temperatures and fire weather!