Southern Heat Wave Threatens Record-High Temperatures This Week

Southern heat wave conditions are intensifying across the U.S. South, with triple-digit temperatures and heat indexes reaching up to 115°F. Millions of people are under heat alerts as dangerous heat is expected to persist through the week. Here’s what to know.

Southern heat wave is intensifying

Millions Face Dangerous Heat Across the South 

Millions of people across the U.S. South are facing a prolonged stretch of dangerous heat, with heat advisories covering a broad area from the Southern Plains to the Southeast. 

About 60 million people were under heat advisories, while another estimate put the number at roughly 97 million across the central Plains and Southeast.

The most affected areas include parts of Texas, Oklahoma, Arkansas, Mississippi, Alabama, Georgia, Florida, South Carolina and North Carolina. 

Conditions are particularly concerning along the Gulf Coast and across the Southeast, where high humidity is making already-hot temperatures feel even more oppressive.

The heat is also creating challenges for communities as people return to school and work. Outdoor workers face prolonged exposure, while some schools are adjusting outdoor activities and sports practices as heat indexes climb. 

In parts of South Carolina, football scrimmages were canceled because of an extreme heat warning.

For residents without reliable air conditioning, cooling centers, libraries and other air-conditioned public spaces are becoming important places to escape the heat.

Southern heat wave pattern in the upper level

Source: The Weather Channel

Related

• What is a heat wave?

Temperatures Could Reach 100°F as Records Are Threatened 

Temperatures are expected to climb into the upper 90s and 100s°F across much of the South this week, with the highest readings possible away from the Gulf Coast. 

The Weather Channel forecasts highs of at least the mid-90s across nearly the entire region, while parts of the lower Mississippi Valley, Florida and the Carolinas could approach or exceed 100°F.

The heat could also challenge daily temperature records in several locations. 

Forecasts indicate the greatest potential for records from the lower Mississippi Valley through Florida and the Carolinas as unusually persistent heat settles over the region.

In Charleston, South Carolina, for example, temperatures are forecast to reach 100°F on Tuesday. 

Parts of Oklahoma, North Texas and the Texas Gulf Coast are also expected to see triple-digit temperatures.

High humidity will make the heat feel even hotter across affected areas. 

Heat indexes could exceed 105°F or even 110°F in parts of southern Georgia, coastal South Carolina, the Florida Panhandle, and the Mid-South. 

Temperatures are forecasted to climb into the upper 90s and 100s°F

Source: Fox News

Heat Dome Keeps the South Hot Through the Week 

A stubborn heat dome is helping keep the Southern heat wave in place. 

The high-pressure system, which has expanded from the Southwest toward the Southeast coast, is trapping hot air over the region and supporting several consecutive days of extreme heat.

The heat dome strengthens the Southern heat wave

Source: Los Angeles Times

The weather pattern is expected to remain largely stagnant through the weekend. 

While afternoon thunderstorms may develop in some areas, they are unlikely to bring lasting relief. Instead, the heat can quickly rebuild after storms move through.

For much of the South, the heat wave could persist through at least much of next week. 

Some areas, including Kentucky, Tennessee and the southern Appalachians, may get a slight break by late this weekend, while other locations could remain under oppressive conditions for longer.

Little Overnight Relief Raises Health Risks 

The heat will not ease much after sunset in many parts of the South. Overnight lows are expected to remain in the 70s°F, while some urban areas could stay in the low 80s°F. 

This limited drop in temperature can make it harder for the body to recover from prolonged daytime heat.

The lack of nighttime cooling is especially concerning when extreme heat lasts for several days. 

People may have fewer opportunities to cool down, as the harmful effects of heat increase the risk of heat exhaustion and other heat-related illnesses.

The danger is greater for older adults, children, outdoor workers, and people without access to air conditioning. 

Health officials recommend taking heat warnings seriously and finding a cool, air-conditioned place when temperatures remain elevated overnight.

Prolonged heat can result in many health risks

Stay Safe During the Southern Heat Wave 

With dangerous heat expected to persist for several days, taking simple precautions can reduce the risk of heat-related illness. 

The National Weather Service’s heat alerts should be treated seriously, especially during the hottest part of the afternoon.

People should avoid prolonged outdoor activity during peak heat, drink more water than usual, and take frequent breaks if they must work or exercise outside. 

Wearing loose, lightweight clothing can also help the body stay cooler.

It is also important to check on family members, older adults and people without reliable air conditioning. 

Those who have to spend time outdoors should watch for signs of heat illness and move to a cooler place if they begin feeling unwell.

For more ways to stay safe in extreme heat, read our heat safety tips for practical advice during hot weather. 

Stay safe during a heat wave

References

1. Fox News

2. The Weather Channel

3. The Economic Times

4. Los Angeles Times