Greenville, South Carolina – 90°F heat builds by Friday afternoon through Saturday, straining power grids and increasing travel and heat safety risks across the Gulf-Atlantic coast.
The early-season heat surge will push temperatures 10 to 20 degrees above normal from Louisiana through Mississippi, Alabama, Georgia, and into the Carolinas, with peak afternoon highs reaching the upper 80s to near 90°F. The most intense conditions are expected Friday afternoon into early evening, continuing through Saturday across inland areas where humidity will further elevate heat stress.
According to the National Weather Service and NOAA’s Climate Prediction Center, a moderate risk for hazardous heat is in place Friday into Saturday from eastern Louisiana through Alabama and into western sections of the Carolinas, while a broader slight risk extends toward the coastal Carolinas. This level of heat in mid-April significantly increases the risk of heat-related illness, especially for those without access to cooling.
Major metro areas including New Orleans, Jackson, Birmingham, Atlanta, Greenville, and Charlotte will see the greatest strain, particularly along heavily traveled corridors such as I-10, I-20, I-65, and I-85. Increased energy demand during peak hours may stress local power systems, while vehicle overheating and roadside breakdowns become more likely in prolonged traffic.
Residents are urged to limit outdoor activity during peak afternoon hours, stay hydrated, and check on vulnerable populations. Schools and outdoor event organizers may shift schedules to avoid the hottest part of the day.
The heat risk holds through Saturday evening before gradual cooling begins, though additional advisories or expanded alerts may follow if temperatures persist or climb higher into early next week.
