SAN FRANCISCO (CBS SF) — Another Spare the Air smog alert has been issued in the Bay Area for Thursday by regional air quality officials.

The alert, the fourth for smog so far in 2017, is the result of light winds and triple-digit temperatures in the region that are expected to combine with vehicle exhaust to create unhealthy air quality, Bay Area Air Quality Management District officials said.

Air district officials are calling for Bay Area residents to take public transit or find other ways to avoid driving alone, and said outdoor exercise should only be done in the early morning hours when ozone concentrations are lower.

“More extreme temperatures from climate change and the resulting air quality issues are a reminder of the changes we can all make to reduce our carbon footprint and improve the air we breathe,” air district executive officer Jack Broadbent said in a statement.

Residents can find out when a Spare the Air alert is issued by registering at, calling (800) HELP-AIR, downloading the Spare the Air smartphone app or connecting with Spare the Air on Facebook or Twitter.

TM and © Copyright 2017 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2017 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. Bay City News Service contributed to this report.


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