air quality alert
Pollution level notice
An air quality alert is an official warning issued when pollution levels become unhealthy.
Authorities announce alerts during periods of high ozone, wildfire smoke, or particulate matter, advising people—especially those with respiratory conditions—to limit outdoor activity: The city issued an air quality alert due to smoke from nearby wildfires.
- smogSunlight-activated urban pollution
- pollutionEnvironmental harm from waste
- ozoneTriatomic oxygen allotrope
- hazeMurky atmospheric suspension
- warningAlert about danger
health warning · smoke · wildfire smoke · particulates · breathing · asthma · unhealthy · advisory · wildfire · exhaust · emissions · lung · lung health · hazardous · sensitive · outdoor · stay indoors · inversion
- health alertshealth emergency, disease outbreak, quarantine order, food recall, drug recall
- warningswarning, caution, danger, warning sign, warning label
- weather alertsweather advisory, weather warning, storm warning, tornado warning, hurricane warning
- official noticespublic notice, memo, public notices, bulletin, legal notices
- weatherweather, rain, sun, snow, wind
- emergencies911, ambulance, emergency, emergency room, ER