Kansas City, Missouri – A dangerous gas could already be building inside homes across the Heartland as cool spring nights keep windows closed, allowing radon—known as the “invisible killer”—to accumulate indoors within hours. The risk can increase rapidly overnight as fluctuating temperatures lead residents to seal homes against lingering cool air.
According to the U.S. Environmental Protection Agency, radon is a radioactive gas that forms naturally in soil and seeps into homes through foundation cracks, basements, and crawl spaces. The Heartland region—including Kansas, Nebraska, Iowa, Missouri, and Oklahoma—features widespread moderate to high radon potential, with elevated levels frequently detected across both rural and metro areas.
Across cities like Kansas City, Omaha, Des Moines, Wichita, and Tulsa, homes with basements are especially vulnerable this time of year. The region’s soil composition and widespread basement construction create ideal pathways for radon to enter and build indoors, particularly when homes are sealed overnight.
Health officials warn radon is the second leading cause of lung cancer in the United States, linked to about 21,000 deaths annually. The gas produces no smell or immediate symptoms, making testing the only reliable way to detect it.
Residents across the Heartland are urged to test homes now as conditions through April continue to trap indoor air. Free and low-cost test kits are widely available, and mitigation systems can significantly reduce indoor levels before risks increase into early summer.
