A prolonged heat wave is tightening its grip across the southern United States, with scorching temperatures, oppressive humidity and unusually warm nights expected to continue across a broad stretch of the region.
From Texas and the Gulf Coast to Florida and the Carolinas, temperatures are climbing into the 90s and, in some locations, the triple digits. The combination of extreme heat and humidity is pushing heat indices above 105°F in several areas, with some spots already approaching or exceeding 110°F.
Southern states face dangerous heat
Nearly the entire South is expected to experience afternoon highs in the mid-90s or higher. Away from the immediate Gulf Coast, temperatures could climb into the upper 90s and 100s.
The lower Mississippi Valley, Florida and the Carolinas are among the areas that could challenge daily temperature records as the heat persists.
High humidity is making conditions even more dangerous. In southern Georgia, coastal South Carolina, the Florida Panhandle and parts of the Mid-South near Memphis, the apparent temperature has already surged beyond 105°F.
Nights offer little relief
The danger will not disappear after sunset.
Overnight temperatures across much of the South are expected to remain in the mid-70s, while major metropolitan areas could struggle to fall below the low 80s.
That lack of nighttime cooling can make prolonged heat particularly hazardous, giving the body less opportunity to recover after a day spent in extreme temperatures.
Heat dome keeps the South sweltering
The heat is expected to linger for days rather than pass quickly.
Kentucky, Tennessee and parts of the southern Appalachians could see some improvement toward the end of the weekend. For much of the rest of the South, however, oppressive conditions are forecast to continue through at least much of next week and potentially beyond.
A persistent atmospheric pattern known as a heat dome is helping trap hot air over the region, allowing temperatures to remain elevated for an extended period.
Who is most at risk?
Extended exposure to extreme heat can become dangerous quickly, particularly for older adults, people with chronic illnesses and anyone without reliable air conditioning.
Heat is already the leading cause of weather-related deaths in the US, making prolonged stretches of high temperatures a serious public safety concern.
Health officials urge people to limit time outdoors during the hottest part of the afternoon whenever possible. Those who must work or exercise outside should take regular breaks, drink plenty of water and avoid strenuous activity during peak heat.
Lightweight, loose-fitting clothing can also help the body cope with high temperatures.
Check on vulnerable people
The combination of intense daytime heat and warm nights can be especially difficult for people living without air conditioning.
Residents are encouraged to check on elderly relatives, friends, neighbours and people with health conditions who may be particularly vulnerable to prolonged heat.
With little relief expected across much of the South, staying hydrated, reducing outdoor exposure and finding a cool indoor environment could become increasingly important as the heat wave continues.
