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MANSFIELD — With the summer heat settling in, OhioHealth is reminding people to stay hydrated, rest and cool off in the shade as much as possible to avoid heat-related illnesses.

Officials are expecting an increase in patients visiting hospitals this week due to the intense temperatures.

Dr. Bradley Raetzke, OhioHealth assistant medical director of Emergency Services, said that while the air show and Pride festivities are great ways to get outside and enjoy the summer weather, it’s important to remember that staying hydrated and resting is key to avoiding heat-related illnesses such as heatstroke.

“We’ve already seen quite an uptick because of all the events around Columbus,” Raetzke said.

“Things like the air show, the Pride festival. We’ve really seen an uptick in people who have actually been quite sick because of the heat.”

Raetzke said that feeling lightheaded, thirsty or tired are indicative of early signs of heat injury. More serious signs include being unable to sweat or having feelings of nausea and vomiting.

For every 10 to 15 minutes of outside movement, the body should drink 12 to 16 ounces of water to prevent heat-related illnesses.

People who stay outside for most of the day are most likely to develop heat-related illnesses.

Raetzke said to watch out for yourself and others who may not be aware that they are feeling the symptoms of heat.

Anyone who develops symptoms of heat-related illness such as lightheadedness, dizziness, muscle cramps or nausea should seek medical attention immediately.