San Francisco and the wider Bay Area are bracing for a significant heat event, with the National Weather Service (NWS) issuing an Excessive Heat Warning for parts of the region from Tuesday through Friday. Inland areas are forecast to bear the brunt of the scorching conditions, with temperatures predicted to hit a sweltering 110°F in some localities. Coastal areas, meanwhile, can expect cooler temperatures thanks to persistent onshore flows, holding the line with highs in the upper 60s to mid-80s.