weather 18 hours ago Jeff's Forecast: Fast warming as heat wave pushes temps to 105 degrees Chief Meteorologist Jeff Ranieri has the latest on the dangerous heat moving into the Bay Area and what’s causing the temperature surge in your 7 day Microclimate Forecast. US & World Videos 3:26 Vianey's forecast: Heat wave persists 2:00 Autumn heat wave bakes the Bay Area 2:44 Forecast: Excessive heat and hazy sky 2:37 Kari's forecast: Excessive heat and hazy sky 3:12 Excessive heat warning in effect for parts of the Bay Area