Outdoor Triggers

Moulds

Mould is a type of fungus that produces spores that float in the air which are easily inhaled and can lead to coughing, sneezing, wheezing and chest tightness. Mould can be an allergic trigger for some people with asthma.

Mould thrives in humid and damp environments. This includes piles of vegetation, stagnant water, and garbage containers.

Ways to reduce your risk:

If you’re sensitive to mould spores, try the following:

• Have piles of grass removed from your lawn immediately after it’s mowed.
• When leaves accumulate on your lawn, have them raked and removed.
• Keep garbage cans clean.
• Have outdoor containers that hold stagnant water removed.
• Ensure that eaves-troughs on your house face away from the house.
• Avoid areas like forests, parks or gardens in the fall when mould spores are more likely to be in the air.

Air Pollutants

Air quality has a major impact on asthma management and if pollution and other irritants in the air can trigger asthma symptoms.

Common air pollutants include:

• Smoke from cigarettes
• Smog, ozone and other air pollutants
• Forest fires
• Wood fires
• Strong fumes, vapours, or odours
• Dust and particles in the air
• Chemicals

There is good evidence that pollution causes the symptoms of many people with asthma to get worse on days when the Air Quality Health Index is high. If you find your symptoms become worse on these days, try to:

• Reduce the amount of time you spend outside when air-pollution is high.
• Exercise indoors if you usually exercise outdoors.
• Turn on the air conditioner in your home and car and keep your windows closed.
• Take your controller medication as prescribed and carry your reliever medication with you wherever you go, especially on days with poor air quality.
• Follow your Asthma Action Plan

Smoke

Exposure to smoke of any kind can be harmful and trigger asthma symptoms. Everyone knows that smoking isn’t healthy, but if you have asthma it can be even more dangerous. Smoke is frequently responsible for the onset of asthma symptoms and attacks and must be avoided. Tobacco smoke, even secondhand or third-hand, can trigger asthma symptoms. If you have asthma, do not allow any smoking in your home, your car or anywhere else where you spend a lot of time.

Second-hand smoke is especially harmful for children with asthma because their lungs are still developing. Children exposed to second-hand smoke are more likely to experience asthma attacks and to have more severe symptoms. It is also critical that pregnant women avoid smoking and second-hand smoke, as exposure during pregnancy increases the likelihood of children developing asthma.

Third hand smoke (i.e., smoke lingering on clothing or car seats) can also irritate the airways and worsen asthma symptoms.

If you or your child has asthma and you smoke, talk to your doctor about how to quit. If you do not smoke, recognize that second-hand smoke & third hand smoke, should be avoided at all times. If you wish to quit smoking, there are many options available to assist you. Talk to healthcare provider about how nicotine-replacement therapy, counseling and other treatments can help you butt out for good.

Marijuana smoke contains many of the same harmful chemicals as tobacco smoke. Long-term marijuana smoking has been associated with increased coughing, sputum (phlegm) production and wheezing. Smoking marijuana can make existing lung conditions worse. If you have asthma, marijuana smoke can cause an asthma attack leading to hospitalization or even death (American Thoracic Society).

Smog

Smog is a combination of vapours, gases, and particles that react to sunlight to produce ozone near the ground. The particles in the air, along with the ozone, can cause lung damage and breathing problems in people with asthma.

The Air Quality Health Index (AQHI) is a rating system developed by Environment Canada and Health Canada to give Canadians information about air quality and how it might affect their health. Based on the amount of smog and other pollutants in the air on that day, the AQHI provides risk ratings and activity recommendations for both at-risk people (including people with asthma) and the general population. For people with asthma, the AQHI ranges and recommendations are:

• 1 to 3: Low Risk — Enjoy your usual outdoor activities
• 4 to 6: Moderate Risk — Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms
• 7 to 10: High Risk — Reduce or reschedule strenuous activities outdoors. Children and the elderly should also take it easy
• Over 10: Very High Risk — Avoid strenuous activities outdoors.Children and the elderly should also avoid outdoor physical exertion

Learn to assess the effect of AQHI on your breathing — note if you often experience flare ups at certain AQHI levels so you can avoid outdoor activities on days with poor air quality. Although most air pollution comes from sources that are out of your control — like motor vehicles or factories — using gas-powered machines such as lawn mowers can also harm the air quality in your immediate area and trigger an asthma attack, especially on days when the overall pollution is already high.

How to help reduce smog:

• Take public transit or carpool to reduce car emissions
• Avoid idling your car
• Consider fuel efficiency when you buy a car
•  Avoid using gas-powered machinery like lawn mowers, leaf blowers, or electricity generators

Cold Air

Cold, dry winter air can be an asthma trigger.

Reducing Your Risk:

If you’re affected by the cold, the following tips can help:

• Try breathing through your nose. This helps warm the air before it reaches your lungs.
• Keeping your asthma well controlled all the time by taking your controller medication as prescribed by your doctor
• Carrying your reliever medication with you at all times. If it’s a particularly cold day and cold air is one of your triggers, consider taking your medication 10-15 minutes before exposure to cold air
• Follow your Asthma Action Plan.
• Check weather conditions before going out and dress for the weather conditions. Stay warm: wear your hat, gloves, mittens and appropriate clothing for the temperature.
• If you have to breathe through your mouth, wear a scarf or a special cold-weather mask to help humidify and warm the air you breathe, making it easier on your lungs.
• Avoid outdoor exercise as much as possible, but especially in cold weather.

Hot Weather

Changes in temperature like heat waves are known to trigger asthma symptoms in some people.

Reducing Your Risk:

If you’re affected by hot weather or changes in temperature, the following tips can help.

• Plan ahead. Don’t let the weather catch you off guard. Schedule outdoor activities early in the morning to avoid the hottest parts of the day. 
• Hot and humid weather can worsen allergies, too. Check the Pollen Count and your local Air Quality Health Index before venturing out and starting your day. If there is poor air quality or a high pollen count, it may be best to stick to indoor activities. Many triggers like pollen, dust and mould are more prevalent during summer months and can trigger asthma symptoms. 
• Keep cool. Staying cool is crucial to controlling your asthma in warm weather. Try ducking inside between activities and just sitting in the air conditioning to cool off. You can also consider going for a refreshing swim.
• Carry your reliever medication with you at all times. Be sure to keep you medications out of direct sunlight and out of places known to get hot, like the glove compartment of your card. You medications should be close by, and cool.
• Keep your asthma well controlled all the time by taking your controller medication as prescribed by your doctor.
• Know your limits. On really hot and humid days, sometimes it’s bes to stay inside and avoid the heat altogether.
• Stay hydrated. This tip may seem obvious, but it’s so important to drink lots of water and stay hydrated when you’re outside in hot weather.
• Follow your Asthma Action Plan. One benefit of an Asthma Action Plan is being able to identify when your asthma is flaring up and knowing what to do when that happens. The summer season is a great time to review your Action Plan with your health care team.
• Reach out if you have questions. If you know your asthma is worse in the summer season or triggered by hot and humid weather, talk to your doctor about your asthma treatment and make sure it is right for you.

Weather Changes

Weather can affect your asthma. Cold weather, hot weather, and severe weather can all have impacts on your asthma and trigger symptoms.

Thunderstorms

Thunderstorms and severe windy weather can be an asthma trigger. After thunderstorms, there are more airborne allergens in the air, such as pollens which may lead to asthma symptoms.

If thunderstorms trigger your asthma you can:

• Continue taking your controller medication as prescribed by your doctor to keep your asthma under control and decrease your chances of having flare-ups.
• Carry your reliever medication with you at all times, especially if you know there is going to be a thunderstorm or windy weather.
• Follow your Asthma Action Plan.
• Check the weather frequently and stay indoors when you expect severe weather that could impact your asthma.
• If you are using your reliever (rescue) inhaler more than twice per week, or you notice that you are experiencing frequent asthma symptoms speak with your doctor about your treatment plan and asthma management.
• Check the Air Quality Health Index
• Know what to do in case of an asthma attack. 

Cold Air

Cold, dry winter air can also make breathing difficult. Breathing through your nose on cold days helps warm and humidify the air before it reaches your lungs. Other steps you can take to manage your asthma in cold weather include:

• Keeping your asthma well controlled all the time by taking your controller medication as prescribed by your doctor
• Carrying your reliever medication with you at all times. If it’s a particularly cold day and cold air is one of your triggers, consider taking your medication 10-15 minutes before exposure to cold air.
• Follow your Asthma Action Plan.
• Check weather conditions before going out and dress for the weather conditions. Stay warm, wear your hat, gloves, mittens and appropriate clothing for the temperature.
• Wear a scarf or face covering around your nose and mouth to help keep the air you breathe warm and moist.
• Avoid outdoor exercise as much as possible, but especially in cold weather.

Hot weather

For some people hot summer weather can trigger asthma symptoms. In the summer there can a lot of pollens and other airborne pollutants in the air. If your asthma symptoms are worse in the summer, we’ve listed some steps you can take below to manage your asthma in the heat. 

• Take your medications as prescribed and carry your reliever medication with you at all times. Also speak with your doctor about allergy medications if you have allergic triggers like pollen.
• Follow your Asthma Action Plan.
  
• Avoid peak heat times; schedule your activities in the early morning or in the evenings when temperatures are cooler and air quality is better
• Exercise indoors rather than outside in the heat
• Check the pollen count and your local Air Quality Health Index (AQHI) before starting your day.
• Ensure you stay hydrated and take breaks from activity when you need to. 

Forest Fires

Wildfires are most common during hot, dry, summer months but can occur at any time of year. Smoke from forest fires can travel long distances and affect people far away from the fire source. Even for people without asthma, smoke and airborne particles from burning trees can irritate the eyes and airways. In people with asthma, these can worsen asthma symptoms and cause potentially life-threatening asthma attacks.

If forest fires are common where you live, it’s important to speak with your healthcare provider before fire season starts and make any necessary changes to your Asthma Action Plan and treatment routine. 

Some tips to help minimize your risk are listed below.

• Be prepared; speak with your doctor about your asthma well in advance of fire season. Have them go over your Asthma Action Plan, your controller medication and reliever medication and check your inhaler technique. 
• Carry your reliever (rescue) medication with you everywhere you go, just in case symptoms flare-up or smoke triggers an attack.
• Know what to do in case of an asthma attack.
• Keep your asthma managed; if you’re using your rescue inhaler more than twice per week your asthma is not properly managed and you should speak with your health care provider.
• Monitor your local Air Quality Health Index.
• Make sure you have a fire plan in place and put together an emergency kit that includes extra medications and supplies in case of evacuation.
• Avoid smoke as much as possible; this one may seem fairly obvious, but if there is smoke in the air that isn’t directly posing a threat, stay indoors and keep your windows and doors closed; avoid exercising outdoors.

Outdoor Exercise

Asthma symptoms are often triggered by exercise, especially when asthma is not under control. When exercising, there is a tendency to breathe the mouth instead of the nose, which allows unhumidified and unfiltered air into the lungs.

Should I avoid exercise because of my asthma?

Having asthma doesn’t mean that you have to limit your physical activity. If you have limitations in your ability to exercise because of your asthma, your asthma is most likely poorly controlled and you should speak with your health care provider to find a treatment plan that is right for you.

Some tips for managing your asthma & exercising include are listed below. 

• Talk to your healthcare provider if exercising triggers asthma symptoms.
• Take your controller medication as prescribed for long-term asthma control
• Carry your reliever medication with you at all times. If working out triggers your symptoms, take your reliever medication 10-15 minutes prior to exercise.  
• Avoid exercising outdoors when it’s cold or extremely hot outside. If you must exercise outdoors, aim for the early morning or evening and check the Air Quality Health Index before you head outside.
• Know the signs of poor asthma control; you can take this short quiz to help find out if your asthma is properly controlled.
• Know what to do in an asthma attack.
• Follow your Asthma Action Plan.