A brief but intense heat wave is expected to bring elevated fire danger to parts of Northern California, including Napa and Sonoma counties, prompting PG&E to warn of possible power shutoffs. - Temperatures could reach the high 90s to 100s by Thursday in the hottest areas, such as the far East Bay and North Bay interior.
- Gusty offshore winds will increase fire concerns, with the highest threat from Wednesday night through Thursday evening. - PG&E may implement public safety power shutoffs to prevent wildfires.
- A gradual cooldown is expected after Thursday, with temperatures dropping to the low 80s by Sunday.