The warning will take effect at 11 p.m. Tuesday and is expected to expire on Wednesday at 8 p.m.
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"Conditions for rapid fire spread will be most prominent along the higher terrain in eastern Napa County," the NWS says.
Officials are warning residents to not burn outdoors and to keep in touch with local officials for the most up-to-date information.
The NWS says this is the first time since October 2021 that they have issued a Red Flag Warning for the Bay Area.
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The video in the media player above is from a previous report.