(CBS SF) — The National Weather Service has issued a Red Flag Warning for the North Bay mountains and other parts of the Bay Area above 1,000 feet between 8 p.m. Saturday and 10 a.m. Sunday.

Northeast winds of 20-30 mph with gusts up to 35 mph will develop around sunset Saturday, and the highest threat of fire is in Napa County and northern Sonoma County. The affected area also includes higher terrain areas of Marin County and some East Bay counties.

There will be little overnight humidity recovery, and any fires that develop have the potential to spread rapidly, the National Weather Service said.

Hot and dry weather will continue Sunday afternoon with temperatures in the mid-80s and lower 90s.

Many agencies, including the Marin County Fire Department, will be monitoring the weather closely and will be watching for reports of wildfires.

PG&E said that with heightened fire risk, it may be necessary for them to turn off electricity in a Public Safety Power Shutoff. The utility is advising North Bay residents to be prepared in case they need to proactively turn off power.

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