The National Weather Service has extended the excessive heat warning yet again. The heat warning, which was issued on Sept. 30, has been extended to 11 p.m. on Saturday. KRON4 meteorologist John Sharble forecasted that the weather will be cooler starting Sunday,

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.

This weekend the thermometer is expected to soar past 100 degrees in many parts of California, just as it has for much of what has been a record-setting week.