New Orleans, Louisiana – A dangerous gas could already be building inside homes along the Gulf Coast as warm spring days and cooler overnight temperatures keep windows closed, allowing radon—known as the “invisible killer”—to accumulate indoors within hours. The risk can increase quickly overnight, especially as homes rely on air conditioning or remain sealed against humidity.
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, slab floors, and crawl spaces. The Gulf Coast region—including Texas, Louisiana, Mississippi, Alabama, and Florida—is generally considered a lower to moderate radon-risk area, but elevated levels have still been detected in pockets across each state, particularly in inland and suburban zones.
Across cities like Houston, New Orleans, Mobile, Tampa, and Gulfport, homes built on slab foundations are especially vulnerable during seasonal transitions. Overnight sealing of homes to control humidity can trap radon indoors, allowing concentrations to build 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 Gulf Coast are urged to test homes now as conditions through April continue to support indoor buildup. Free and low-cost test kits are available across the region, and mitigation systems can significantly reduce indoor levels before risks increase into early summer.
