The San Francisco Bay Area faces an early summer heat spike with temperatures climbing into the 90s on Thursday, reaching 16 degrees above normal in San Francisco. Inland valleys will bear the brunt while coastal communities stay cooler in the 60s and 70s. The National Weather Service has issued red flag warnings for mountain areas north of the bay and East Bay Hills through Thursday morning.

Pacific Gas & Electric may cut power to homes and businesses as wind gusts up to 45 mph—potentially exceeding 60 mph in spots—heighten wildfire risks. These pre-emptive shutoffs could disrupt operations for residents and businesses during peak heat hours. The utility's actions reflect growing concerns about infrastructure safety during extreme weather events that have plagued California in recent years.

East Bay Regional Park District has banned campfires, barbecues, welding, and off-road driving in parks, citing the elevated fire danger. Assistant Fire Chief Khari Helae emphasized that 90 percent of fires are human-caused, making prevention measures critical during these conditions. The restrictions directly impact outdoor recreational businesses and contractors operating in affected areas.

Relief arrives by Sunday when cooler air moves in, bringing San Francisco back to a more typical 71 degrees. Until then, businesses and residents must navigate both extreme heat and potential power disruptions while fire officials monitor conditions closely.