The Air Quality Index (AQI) measures how polluted the air is. During wildfire events, AQI can spike to hazardous levels (200+) in areas far from the actual fire.
At AQI 150+, outdoor activity should be minimized for everyone. At 200+, staying indoors with windows closed is important even for healthy adults. Sensitive groups — children, elderly, people with respiratory conditions — should take precautions at lower AQI levels.
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