An excessive heat advisory from the National Weather Service has been extended for the Bay Area through Sunday night. Temperatures are forecast to reach above 100 degrees in some places, with a high of 105 degrees forecast inland. Overnight temperatures on Saturday night are forecast to be in the 70s and 80s. bay area weather Oct 2 Temperature records set during the Bay Area's fall heat wave weather 9 hours ago Cinthia's forecast: Hot weekend The heat can cause life-threatening conditions and is dangerous for most segments of the population, according to the Weather Service. They ask the public to not leave people or pets in vehicles. The Weather Service advised limiting outdoor activities to the afternoon or evening, staying hydrated and taking cooling breaks. This story uses functionality that may not work in our app. Click here to open the story in your web browser.