Spare the Air Alert Issued for Bay Area Sunday

SAN FRANCISCO (CBS SF) -- A Spare the Air Alert has been issued for Sunday in the Bay Area because of an excessive amount of smog expected in the region, air quality officials said Saturday.

A high-pressure system over the region, triple-digit temperatures, light winds and smoke from Oregon wildfires are expected to contribute to unhealthy ozone levels in the South and East Bay regions, according to the Bay Area Air Quality Management district.

There is no free transit tomorrow and there is no wood-burning ban in place, air quality officials said.

The alert is the eighth such alert in 2017.

"Hot temperatures and tailpipe exhaust from Bay Area traffic are expected to cause unhealthy air quality this weekend," air district executive officer Jack Broadbent said in a statement.

During Spare the Air days, air quality officials advise people to limit outdoor activities during the hottest part of the day and to take public transit or carpool instead of driving alone.