FIRST ALERT: Heat advisory issued for Sunday

VIDEO: Heat advisory in effect Sunday

CHARLESTON, S.C. (WCSC) - High temperatures near 100 expected Sunday prompted the National Weather Service in Charleston to issue a heat advisory as a warning to take precautions.

The heat advisory will be in effect from 11 a.m. until 8 p.m. Sunday.

Temperatures are expected to reach between the upper 90s to approximately 103 degrees. Those temperatures, combined with moderate humidity will produce a heat index of between 103 and 107 away from the immediate coast.

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The advisory includes Charleston, Berkeley, Dorchester, Colleton, Beaufort, Jasper, and Hampton Counties.

The National Weather Service says maximum heat index values could reach 105 degrees or higher Sunday through Wednesday afternoon. The agency issues heat advisories when heat index values reach at least 105 degrees.

Chief Meteorologist Bill Walsh said he doesn’t expect much change looking into next week with Tuesday and Wednesday in the upper 90s and mostly dry.

Excessive heat can pose health risks

Hospitals like Bon Secours Roper St. Francis Healthcare urge people to use caution and be aware of the risks of heat-related illnesses.

Heat stroke is one of the leading cases our doctors see during busy summer weekends, hospital spokesman Brian DeRoy said. It is more severe than heat exhaustion, which has symptoms including weakness, rash, muscle cramps and even the beginnings of heat stroke.

ER physician Dr. Steven Feingold says heat stroke is a severe disorder that causes neurological problems, such as headaches and confusion.

“When you have something affecting the brain, that’s a medical emergency," Feingold says. “You need be evaluated and cooled down immediately.”

Besides confusion or neurological symptoms, when someone stops sweating, that can also be a warning sign, he says.

“When you’re sweating, that’s your body’s cooling mechanism.,” Feingold said.

To avoid heat exhaustion and heat stroke:

  • Limit exposure to the heat – stay in a cool environment and use fans to reduce the temperature.
  • Stay hydrated – consistently drink water throughout the day.
  • Limit alcohol use – it disrupts the body’s mechanisms for cooling itself and dehydrates.
  • Morning coffee dehydrates you, don’t drink too much of it.
  • Babies are at the highest risk because they can’t sweat as much and sunscreen is not recommended under six months. Best advice: keep them cool and out of the sun.

They are declared for major weather events like impacts from hurricanes, the likelihood of severe thunderstorms and tornadoes, as well as disruptive weather like excessive heat or cold.

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