Mother Nature is about to crank up the heat across the region. Wednesday marks the official start of summer, and temperatures are set to soar.

Get ready to blast on the air conditioning. Temperatures are expected to reach the mid 90's on Wednesday and Thursday, bringing a sizzling start to summer.

"If you have air conditioning use it. This is not the time to be frugal and decide I do not want to spend the money," said Martha Sitler, the vice president of education for Berks Encore.

If you don't have air conditioning, open up the windows in your house to keep the air circulating. If not, the temperature inside can heat up quickly. You can also keep your place cool by pulling the blinds closed to keep the sun out.

"People tend to forget because it is early in the season what 97 degrees feels like, so I think people need to be prepared now," said Adrian Grieve, with the Berks County American Red Cross.

Grieve is issuing a warning ahead of the heat. Everyone is being urged to stay hydrated by drinking plenty of water. Eat small meals and eat often, wear loose-fitting and light-colored clothing, stay indoors and avoid strenuous work and exercise during the hottest part of the day.

"It's extremely important to keep an eye on everybody, but specifically our seniors, young children and pets," said Grieve.

Senior centers are opening their doors and inviting everyone in as an extra option out of the sun.

"Join us for lunch at any of the senior centers in Berks County, or go to a mall or any place where it's cool where you can get away from the oppressive heat," said Sitler.

For more information and other ways to stay safe during the expected heat, visit RedCross.org.