July 27, 2026
ST. TAMMANY PARISH, La. — The National Weather Service issued an Extreme Heat Warning for Tuesday, July 28, across northern, southwestern and southeastern St. Tammany Parish, with heat-index values of 113 to 115 degrees expected.
The warning will be in effect from 11 a.m. until 8 p.m. Tuesday. The affected area includes Slidell, Covington, Mandeville, Madisonville, Folsom, Bush and surrounding St. Tammany communities.
A separate Heat Advisory remains in effect until 8 p.m. Monday, July 27. The NWS said heat-index values could reach 108 degrees during Monday’s advisory.
The NWS warns that heat-related illnesses increase significantly during extreme heat and high humidity. Residents should drink plenty of fluids, remain in air-conditioned spaces when possible, avoid prolonged sun exposure and check on relatives and neighbors.
People working outside should take frequent breaks in shaded or air-conditioned areas. Anyone showing signs of heat stroke should be moved to a cool, shaded location, and 911 should be called immediately.
APR•St Tammany is not a meteorologist. Forecasts can change quickly. Always follow the National Weather Service and local emergency officials for the latest official information.