Raleigh, N.C. — Temperatures soared to 101 degrees Sunday in the Triangle. The evening could bring a rain shower, however, and cool things off.

"Two separate systems are going to impact us over the evening and into the overnight hours. I definitely think there is a good possibility someone will see a thunderstorm," WRAL meteorologist Kim Deaner said.

Softball teams competing Sunday in the NCASA Fastpitch tournament at the Walnut Creek Softball Complex in Raleigh tried to keep cool.

”It has been blistering,” softball player Regan Taylor said of the heat.

“You just sweat a lot and you have got to wipe it off,” softball player Taylor Rosenbalm said.

David Ross umpired in the blazing sun all three days of the tournament.

“If you're sweating, that's a good thing. If you stop sweating, then that's not a good thing,” he said.

Umpires have had it tough battling the heat. Tournament organizers said three had symptoms of heat exhaustion and one was treated and released from a nearby hospital.

If you must be outside during the heat of the day, the Department of Health and Human Services recommends drinking plenty of non-alcoholic, sugar-free fluids to stay hydrated.

Everyone is at risk of heat-related injuries, but infants and children younger than 4, as well as people over 65, those who are excessively overweight and physically ill are most susceptible:

Other recommendations for avoiding heat-related injuries:

• Don't stay inside a vehicle, and don't leave children or pets – even for a few minutes. Interiors heat up quickly.
• Don't wait until you're thirsty to drink.
• If exercising outdoors, drink two to four glasses of water each hour to help replace salt and minerals in the body that are lost in sweat.
• Wear lightweight, light-colored clothing, and use sunscreen of SPF 15, or higher, 30 minutes prior to being outside.
• Check on older neighbors at least twice a day.
• Limit outdoor activity to the morning and evening hours if you have to be outside. Have plenty of water on-hand when working in the heat.

Heat cramps, signaled by abdominal, arm and leg cramps, are the first sign of heat injury.

Heat exhaustion, a milder form of heat-related illness, can develop after several days of exposure to high temperatures and inadequate replacement of fluids.

Warning signs include heavy sweating, muscle cramps, dizziness, headaches, cool and moist skin, a fast pulse rate and fast and shallow breathing.

Heat stroke, which can cause injury or death if not treated, occurs when the body's temperature rises rapidly, sweating mechanisms fail and the body can't cool.

Body temperature might rise to 106 degrees or higher rapidly, within 10 to 15 minutes. Warning signs include red, hot, dry skin with no sweating; rapid, strong pulse; throbbing headache; dizziness.