* WHAT. Dangerously hot conditions with temperatures 95 to 107 possible and widespread Major HeatRisk. Limited overnight relief with low temperatures in the 60s to mid 70s. * WHERE. Carquinez Strait and Delta, Sacramento Valley, Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northeast Foothills, Northern San Joaquin Valley, Shasta Lake Area / Northern Shasta County. * WHEN. From Monday morning through Wednesday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat events, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS. Hottest temperatures are expected Tuesday. Area waterways will continue to run cold and fast, creating dangerous conditions for those seeking relief in rivers and lakes.

* WHAT. Southwest winds 10 to 20 kt and a moderate chop expected. * WHERE. San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN. Until 3 AM PDT Sunday. * IMPACTS. Conditions will be hazardous to small craft.