Air Pollution Increased by Summer Heat and Wildfires

Hazy days of summer can boost air pollution, health risks for many

Ground-level ozone and forest fire smoke are common in summer

OLYMPIA - In Washington, we welcome warm sunny weather, ready to spend more time outdoors in the garden and on hiking trails. Summer is also wildfire season and a time when ozone levels rise, making it more difficult to breathe for people with heart and lung diseases.

“It’s important for people who have conditions like asthma, bronchitis, and heart disease to pay attention to air quality reports,” said State Health Officer Dr. Maxine Hayes. “Air pollution makes it hard for everybody to breathe. And poor air quality affects people with heart and lung diseases earlier than others. If you live in an area that has forest fires, make sure to protect yourself from smoky conditions.”

Older adults are vulnerable because they often don’t know they have these diseases. New research suggests that breathing air that has high “particulate” matter, or fine particles, can also be risky for people who are obese or have diabetes. Children are vulnerable to polluted air because their lungs are still growing and they spend more time outdoors.

Different things cause summer air pollution. Several consecutive days of sunny, hot weather will increase ozone. Wildfires like the ones that have broken out in central Washington recently produce smoky air that contains fine particles and toxic chemicals. Cars and trucks generate exhaust. On calm days when the air is still, air pollutants build up. Ongoing climate changes are projected to cause additional bad air quality by increasing wildfires and ozone pollution.

Everyone can lower their exposure to air pollution by checking air quality conditions before taking part in outdoor activities, especially people in high risk groups. When air pollution is high, people should limit outdoor activity and choose less strenuous things to do — such as going for a walk instead of a run. Pollution levels are often highest at midday or in the afternoon, so exercising earlier or later may be wise. Indoor exercise is another option.
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