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 2:18:17 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

Gale Watch

High Temperature Forecast

100°F Probabilities

Moderate HeatRisk

Elevated Fire Weather Conditions

Heat & Fire Safety

A look at the forecast high temperatures around the region for today, Thursday July 30, 2026. Seasonable temperatures today, with slightly warmer highs compared to yesterday.

A look at the probabilities of select cities reaching the 100°F temperature the next week. Friday has the best chances in the remainder of this week with modest to high probabilities this weekend and into early next week as well.

Moderate HeatRisk is in the forecast beginning Thursday (Isolated, mainly in the Valley), then widespread Moderate HeatRisk Friday into early next week

Elevated Fire Weather Conditions are in the forecast this Friday through Sunday, due to low daytime humidity values and hot temperatures. Areas of concern are the northern Sac Valley, Burney Basin, and Sierra foothills.

Hot days are in the forecast! Hot temperatures, and low daytime humdity 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 safety!