What you can do to breathe easier when it’s hot and humid
Pay attention for air quality and humidity (humidex) advisories.
Look up your local air quality readings. You can find the latest local air quality forecasts and information on Environment Canada’s website.
Especially on days that have high levels of air pollution or smog, stay indoors, preferably in a place that’s cool and has clean air (no tobacco smoke or harsh scents).
Drink plenty of water.
Avoid strenuous activities and reduce the amount (or length of time) of exercises during these times.
Wear loose, light-coloured clothing and a hat if you go outdoors.
Avoid exercise, especially during the hottest time of the day (generally between 11:00 AM and 3:00 PM).
Know the signs of heat stroke and when to see your doctor.
At home
Keep your windows and doors closed to keep your house cool and keep pollutants out. Keep your curtains and blinds drawn to keep out the heat. Turn on fans.
If your home is not air conditioned, go to an air-conditioned public space, like a recreation centre, public library or shopping mall.
At night, if you don’t have air conditioning and there are low levels of air pollution outdoors, open your window to let the cooler air in.
Make sure someone checks up on you if you are living alone.
If you have lung disease
Heat and humidity can exacerbate the symptoms of lung disease. Take your medication as directed.
If you’ve been prescribed a rescue inhaler (usually blue), keep it with you at all times.
Signs of worsening COPD (a COPD “flare up”) can include increased shortness of breath, as well as increased coughing and sputum (phlegm or mucus).
If you notice any of these symptoms, follow the advice in your COPD action plan. If you don’t know what to do or if your symptoms are getting worse, call your doctor. If you can’t reach your doctor, go to the hospital emergency department.
Many people with asthma experience asthma flare-ups in times of high heat and humidity. Extreme temperature can cause air to become stagnant (not move), trapping pollutants in the air, which can also cause an asthma flare-up.
Questions? Call our Lung Health Information Line: 1-866-717-COPD (2673).
More on outdoor air quality
Climate change and lung health