* WHAT. Minor coastal flooding. * WHERE. San Francisco and San Francisco Bay Shoreline Counties. * WHEN. Until 11 PM PDT Wednesday. * IMPACTS. Flooding of lots, parks, and roads with only isolated road closures expected.

* WHAT. Temperatures in the mid to upper 80s expected. Temperatures near 90 for southeast portions of the city. * WHERE. San Francisco. * WHEN. Until 7 PM PDT Thursday. * IMPACTS. Those sensitive to heat, such as the homeless, elderly, children, and pets will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk. * ADDITIONAL DETAILS. The temperature will vary greatly across the city with the highest temperatures in the SE and downtown and more mild temperatures in the West Side and along

* WHAT. Dangerously hot conditions with high temperatures from 105 to 118. Limited overnight relief with low temperatures in the upper 60s to mid 80s. Widespread Major to Extreme HeatRisk is expected. * WHERE. Carquinez Strait and Delta, Central Sacramento Valley, Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northeast Foothills/Sacramento Valley, Northern Sacramento Valley, Northern San Joaquin Valley, Shasta Lake Area / Northern Shasta County, and Southern Sacramento Valley. * WHEN. Until 11 PM PDT Tuesday. * IMPACTS. Heat related illnesses increase significantly during extreme heat events, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS. Heat could significantly impact outdoor holiday activities. Area waterways will continue to run cold and fast, creating dangerous conditions for those seeking relief in rivers and lakes. Delta breeze influence will result in slightly cooler, but still hot temperatures in the Vicinity Delta and western portions of the Sacramento Area by late weekend into early next week.

* WHAT. Minor coastal flooding. * WHERE. San Francisco and San Francisco Bay Shoreline Counties. * WHEN. Until 5 AM PDT Friday. * IMPACTS. Flooding of lots, parks, and roads with only isolated road closures expected.

* WHAT. Minor coastal flooding. * WHERE. San Francisco and San Francisco Bay Shoreline Counties. * WHEN. Until 5 AM PDT Friday. * IMPACTS. Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS. Tidal levels are increasing as a result of higher astronomical tides. Low lying areas within the SF Bay Area may see minor flooding as a result during high tide. Next high tide in San Francisco is 6.77 feet at 10:00 PM July 3rd.

* WHAT. Dangerously hot conditions with high temperatures from 105 to 118. Limited overnight relief with low temperatures in the upper 60s to mid 80s. Widespread Major to Extreme HeatRisk is expected. * WHERE. Carquinez Strait and Delta, Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northeast Foothills, Sacramento Valley, Northern San Joaquin Valley, Shasta Lake Area / Northern Shasta County. * WHEN. Until 11 PM PDT Tuesday. * IMPACTS. Heat related illnesses increase significantly during extreme heat events, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS. Heat could significantly impact outdoor holiday activities. Area waterways will continue to run cold and fast, creating dangerous conditions for those seeking relief in rivers and lakes. Delta breeze influence will result in slightly cooler, but still hot temperatures in the Vicinity Delta and western portions of the Sacramento Area by late weekend into early next week.

* WHAT. Temperatures in the mid to upper 80s expected. Temperatures near 90 for southeast portions of the city. * WHERE. San Francisco. * WHEN. Until 7 PM PDT Thursday. * IMPACTS. Those sensitive to heat, such as the homeless, elderly, children, and pets will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk. * ADDITIONAL DETAILS. The temperature will vary greatly across the city with the highest temperatures in the SE and downtown and more mild temperatures in the West Side and along.