As the San Francisco Bay Area enters the seventh day of a historic heat wave, forecasters are warning people to drink plenty of water and stay inside.

The Bay Area roasted under more scorching temperatures Sunday, but conditions predicted to cool down Monday, meteorologists said. After San Francisco hit 97 degrees Sunday, its hottest day of the year,

As a brutal heat wave continued in the Bay Area Sunday, officials issued an alert urging residents and people attending a popular San Francisco music festival to exercise heat safety.

Heat records were matched or broken Sunday across the Bay Area and beyond, surpassing temperatures from a heat wave that hit nearly 100 years ago, according to the National Weather Service.

Previous record highs in the city of Napa, as well in the city of Santa Rosa — both made in 1980 — were either tied or broken last week, officials said, while a third local record, set in 1930, may have been broken on Sunday.

“All of the heat warnings and advisories — they’ve all been extended,” NWS meteorologist Nicole Sarment said. “We’ve got a tiny disturbance (Friday), and the main threat from that will be an increase in winds, and there’s some degree of moisture. But this isn’t over yet.”

An excessive heat warning has been extended for much of the Bay Area through late Friday night, as a late season heat wave continues to bring hot temperatures to the region, some of which have been record-breaking.

More scorching temperatures were expected across much of the Bay Area on Sunday with conditions predicted to cool down Monday, meteorologists said. The National Weather Service extended excessive heat warnings for several Bay Area counties,