smog alerts
Hazy air warnings
Smog alerts are official warnings issued when air pollution reaches levels considered harmful to health.
Government agencies declare them based on measured concentrations of ozone, particulate matter, or other pollutants: The city issued a smog alert advising people to limit outdoor activity.
During alerts, vulnerable populations—children, the elderly, those with respiratory conditions—are urged to stay indoors.
- pollutionEnvironmental harm from waste
- hazeMurky atmospheric suspension
- ozoneTriatomic oxygen allotrope
- air qualityPollution level measurement
- air quality indexScale measuring atmospheric pollution levels
warning · health · breathing · respiratory distress · asthma · exhaust · emissions · particulates · cityscape · summer · heat · gray · thick · visibility · masks · stay indoors · indoors · lungs
- air pollutionair pollution, emissions, air pollutants, pollutants, soot
- urban hazardspotholes, crime, traffic, accidents, sinkholes
- Air Pollutantssoot, exhaust, fumes, carbon monoxide, carbon dioxide
- Air Qualityair filters, air testing, air purifiers, emissions, pollutants
- smoghaze, brown cloud, particulates, PM2.5, soot
- Air RegulationsClean Air Act, emission standards, emission limits, EPA standards, emissions standards