A heat wave that kicked in late Monday morning for the Bay Area will linger through Thursday night, with record-setting temperatures possible, forecasters said.
The heat is expected to peak Wednesday throughout the region and areas of the Central Coast, according to the National Weather Service.
A heat advisory has been issued through Thursday for interior areas, which will see temperatures ranging from the 90s to 104 on the hottest days. Shoreline areas and the Santa Cruz County coast could warm to the upper 80s and lower 90s, forecasters said.
Downtown San Francisco can expect temperatures in the lower 80s while oceanfront areas will peak in the mid 70s. Other coastal areas should remain relatively mild, in the 70s to about 80 degrees, compared to inland areas.
Overnight lows will range from the upper 50s to mid 60s, which may limit the amount of typical overnight relief from the heat, the weather service said.
Bay Area air quality officials issued a Spare the Air alert for the second straight day Tuesday due to light winds and rising temperatures. Outdoor exercise should be done only in the early morning hours when ozone concentrations are lower.