* WHAT. Temperatures up to 94 expected. * WHERE. San Francisco, Coastal North Bay, Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast. * WHEN. From 11 AM this morning to 11 PM PDT Wednesday. * IMPACTS. Moderate-to-Major HeatRisk. This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration.

* WHAT. An Excessive Heat Warning has been issued for San Francisco for dangerously hot conditions with temperatures up to 92 expected in portions of the city. * WHERE. San Francisco. * WHEN. The Excessive Heat Warning will begin at 10 AM this morning, and be valid until 8 PM PDT this evening. The Excessive Heat Warning will then become a Heat Advisory from 8 PM this evening until 11 PM PDT Wednesday. * IMPACTS. Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.