Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

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Last Map Update: Sat, Aug 29, 2026 at 2:06:23 am PDT

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

Small Craft Advisory

River Safety

Scheduled releases from Lewiston Dam will cause faster and colder flows on the Trinity and lower Klamath Rivers beginning this weekend. These changing conditions will persist through early September. Exercise caution at the river and wear a life jacket or don't swim.