Air quality officials have issued the first Spare the Air alert of the year for ozone in the Bay Area for Friday, when triple-digit inland temperatures are expected to combine with motor vehicle exhaust to create high levels of the harmful pollutant.

The Bay Area Air District issued the alert because air quality is forecast to be unhealthy in the region due to ozone, also known as smog.

Ozone can cause throat irritation, congestion and chest pain and is particularly harmful for young children, seniors and people with respiratory and heart conditions. Air district officials recommend that on Spare the Air days, people only do outdoor exercising in the early morning hours when ozone concentrations are lower.

People can find out when a Spare the Air alert is in effect by signing up for text alerts by texting “START” to 81757, calling (877) 4NO-BURN, visiting www.sparetheair.org or www.baaqmd.gov, signing up for email alerts at sparetheair.org/alerts, or downloading the Spare the Air smartphone app.

Dan McMenamin is the managing editor at Bay City News, directing daily news coverage of the 12-county greater Bay Area. He has worked for BCN since 2008 and has been managing editor since 2014 after previously serving as BCN’s San Francisco bureau reporter. A UC Davis graduate, he came to BCN after working for a newspaper and nonprofit in the Davis area. He handles staffing, including coaching of our interns, day-to-day coverage decisions and management of the newswire.