* WHAT. Hot temperatures 96 to 106 expected with warm overnight lows in the 60s to mid 70s. * WHERE. Carquinez Strait and Delta, Motherlode, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN. Until 11 PM PDT Thursday. * IMPACTS. Heat related illnesses will be possible, especially for groups that are sensitive to heat. * ADDITIONAL DETAILS. Widespread Moderate HeatRisk is expected across the Valley and Delta, with Major HeatRisk in the foothills. Limited overnight cooling expected in the foothills. This level of heat may impact outdoor activities.

* WHAT. Dangerously hot conditions with temperatures up to 94 in the City of San Francisco, and up to 113 for some elevated inland locations. * WHERE. City of San Francisco, North Bay Interior and Coastal Ranges, San Francisco Bay Shoreline, Interior East Bay, Santa Clara County, the Santa Cruz Mountains, and interior Monterey County. * WHEN. Until 11 PM PDT Thursday. * IMPACTS. Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

* WHAT. Hot temperatures 96 to 106 expected with warm overnight lows in the 60s to mid 70s. * WHERE. Carquinez Strait and Delta, Motherlode, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN. Until 11 PM PDT Thursday. * IMPACTS. Heat related illnesses will be possible, especially for groups that are sensitive to heat. * ADDITIONAL DETAILS. Widespread Moderate HeatRisk is expected across the Valley and Delta, with Major HeatRisk in the foothills. Limited overnight cooling expected in the foothills. This level of heat may impact outdoor activities.

* WHAT. Temperatures up to 100. * WHERE. Carquinez Strait and Delta, Motherlode, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN. Until 11 PM PDT Thursday. * IMPACTS. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS. Widespread Moderate HeatRisk is expected across the Valley and Delta, with Major HeatRisk in the foothills. Limited overnight cooling expected in the foothills. This level of heat may impact outdoor activities.

* WHAT. Dangerously hot conditions with high temperatures up to 114 expected. Low temperatures in the northern Coachella Valley mostly in the 80s. * WHERE. San Gorgonio Pass Near Banning. * WHEN. Until 8 PM PDT Monday. * IMPACTS. Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS. Well above average temperatures will continue through early next week.

* WHAT. Temperatures up to 87 in the City of San Francisco, temperatures up to 100 for other inland locations. * WHERE. San Francisco and Northern Salinas Valley, Hollister Valley, and Carmel Valley. * WHEN. Until 11 PM PDT Friday. * IMPACTS. Hot temperatures may cause heat illnesses to occur.