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In addition to a heat advisory this week, officials have issued a smog alert and are warning coastal residents of minor coastal flooding.
A Spare the Air alert has been issued for Wednesday by the Bay Area Air District, with concentrations of ozone expected to be unhealthy. Ozone is a reactive gas that acts as a protective shield against ultraviolet rays in the high atmosphere, but it forms harmful smog at ground level, according to the U.S. Environmental Protection Agency.
The Bay Area Air District reports the highest concentrations of ozone are in the Eastern Zone, which includes San Ramon and Fairfield, as well as the Santa Clara Valley.
The National Weather Service is forecasting the possibility of up to 1.2 feet of coastal flooding in low-lying areas near shorelines and waterways along the shoreline areas of San Francisco, San Pablo and Monterey bays. A minor coastal flooding alert is in effect through 1 a.m. Thursday. The highest tide is predicted to reach 5.7 feet above sea level at 11:30 p.m. on Wednesday.
Travelers are advised to take time to plan safer routes and to never drive through water of unknown depth.
The NWS has also extended its heat advisory through 10 p.m. Thursday. High temperatures in interior portions of the Bay Area will peak between 90 and 105 degrees and dip to the 70s at night. Coastal highs will be in the mid 70s to low 90s, with overnight lows mostly in the mid to high 60s.
The weather service recommends limiting unnecessary outdoor activity to avoid heat illness, taking breaks in the shade and drinking cool water. Never leave children or pets in parked cars, or leave pets or livestock without shade and water.
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