Norfolk, Virginia – A dangerous gas could already be building inside homes along the Atlantic Coast as cool spring nights and shifting coastal air keep windows closed, allowing radon—known as the “invisible killer”—to accumulate indoors within hours. The risk can increase quickly overnight as temperature swings and ocean-driven moisture limit ventilation.
According to the U.S. Environmental Protection Agency, radon is a radioactive gas that forms naturally in soil and can enter homes through foundation cracks, crawl spaces, and slab floors. The Atlantic Coast region—from New York down through Florida—includes a mix of low to moderate radon zones, but elevated levels have been detected in coastal and inland counties, especially where soil composition and housing design allow buildup.
Across cities like New York City, Norfolk, Charleston, and Jacksonville, homes with crawl spaces and slab foundations are especially vulnerable during seasonal transitions. Coastal humidity and cooler overnight air often lead residents to seal homes, trapping radon indoors and allowing concentrations to rise without detection.
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 along the Atlantic Coast are urged to test homes now as conditions through April continue to support indoor buildup. Free and low-cost test kits are widely available, and mitigation systems can significantly reduce indoor levels before risks increase into early summer.
