Bay Area communities can expect another hot day Friday, which has led the Bay Area Air Quality Management District to issue a third consecutive Spare the Air alert this week.
Spare the Air alerts are issued when ozone pollution is forecast to reach unhealthy levels.
"One more day of heat and smog just underscores how urgent it is that Bay Area residents get out of their cars, use public transit, try a carpool and find other way to get to work," said Jack Broadbent of the Air District.
"Tailpipe exhaust is the largest source of air pollution during warmer months and reducing our daily driving will make the air healthier for us all," Broadbent said.
To find out when a Spare the Air alert has been issued, people can sign up for email alerts at sparetheair.org; call 800-HELP-AIR (4357-247); download the Spare the Air smartphone app for iPhone or Android devices; or connect with Spare the Air on Facebook, Twitter or YouTube.