Wildfire smoke can travel many kilometres from a fire and affect communities far away. Even if you cannot see smoke or smell it, tiny particles may still be in the air. Anyone can develop symptoms when air quality is poor, but children, older adults, pregnant people, and people with heart or lung disease are at greater risk.
Check your local Air Quality Health Index (AQHI) before spending time outdoors. The AQHI helps you understand the health risk from air pollution. When the AQHI is high or a wildfire smoke alert is issued, follow local public health advice. Reduce the time you spend outside and avoid strenuous activities such as running, cycling, or heavy yard work.
Keep indoor air as clean as possible. Close windows and doors when outdoor air is smoky if your home stays at a safe temperature. Use air conditioning on the recirculation setting if available, and use a portable HEPA air cleaner if you have one. Avoid smoking, burning candles, using wood-burning fireplaces, or frying foods because these can make indoor air worse.
If your home becomes too hot, protecting yourself from heat is the priority. Go to a cool, air-conditioned public place such as a library, shopping centre, or community centre.
If you must spend time outdoors, keep your visit as short as possible. A well-fitted N95, KN95, or KF94 respirator can reduce the amount of wildfire smoke you breathe, but it does not remove all health risks. Wearing a respirator does not make it safe to stay outside longer or exercise in smoky air. Do not stop or change your prescribed medications without speaking with your healthcare provider. Follow your asthma or heart care plan if you have one.
Seek immediate medical care or call 911 if you have severe trouble breathing, chest pain, confusion, fainting, blue or grey lips or skin, or if your asthma symptoms become severe or are not improving with your usual rescue medicine.
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