Air Quality-Unhealthy/Sensitive Groups: Active youth/adults/people with heart or lung diseases should reduce prolonged outdoor exertion. It’s OK to be active outside, but take more breaks. Watch for symptoms. Visit https://t.co/T895mwtSit for more information. pic.twitter.com/iPdqzoE0gm

— San Francisco Department of Emergency Management (@SF_emergency) December 8, 2024