Some areas around the Coastal Empire hit 100 degrees on Monday.
"I don't like it. My air conditioner just went out so I'm going to have to get a new one installed," said Leo McDonald, of Pooler.
This is the worst time for anyone's air conditioning to break down, with temperatures reaching record breaking numbers, but for McDonald he's seen a lot hotter.
"In the paper mill, in some places it would be 120 degrees, but you couldn't stay there long," he recalled.
Dr. Jay Goldstein, medical director for Memorial Health University Center's emergency department, has seen his fair share of people rushed to the emergency room, who are suffering from a heat-related injury.
"Heat exhaustion is what most people experience where you start feeling light-headed, dizzy, and you might have a little bit of an elevation of your temperature and that is the time when the most important thing to do is to get out of the heat," Goldstein said.
"When heat stroke occurs you get an altered sensorium. They start to become very disoriented, confused, extreme elevations of temperature and that is a true medical emergency," he said.
McDonald is rushing to get a new air conditioner installed.
"We've got to put up with it. It's hotter than it used to be, I think, but all you can do, especially when you're old, is to try to stay cool," McDonald said.
One thing everyone should be sure to do is stay hydrated.
Drink plenty of water. Goldstein said that every so often people should head to a cooler place to allow their body to cool off.
Among those who suffer from heat exhaustion or heat stroke are tennis players and runners. That's because they feel their body is strong enough to beat the heat.
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