Wildfire smoke is here to stay. Here’s how to clean the air inside your home.

The fierce wildfires that broke out across much of the western United States this summer, spreading smoke across hundreds of miles, continue to pose a serious health hazard to millions.

More are expected this fall. That’s a major health concern because microscopic particles in wildfire smoke, carried by the wind, can penetrate deep into your lungs and travel into your bloodstream. One study linked wildfire smoke exposure to a twofold increase in the rate of asthma and a 40% rise in strokes and heart attacks. Other research tied smoke to hospital admissions, emergency room visits and premature deaths.

The standard advice is to stay inside when heavy smoke is in the air. But the smoke can get into your house or apartment. So you might want to consider investing in equipment to clean the air inside your home, especially with climate change likely to continue escalating the scope and intensity of the fires.