As the humidity and heat of summer are upon us, the American Heart Association wants to make sure you are prepared for heat stroke.

When temperatures rise outside, it can be hard to regulate your own body temperature.

Dr. Nupoor Narula, a cardiologist at Weill Cornell Medical Center, says it’s important to know the signs of heat stroke so you can get the proper help.

Rapid pulse, rapid breathing and headaches are common symptoms of heat stroke. Headaches or altered mental status can cause further symptoms, from confusion to seizures and loss of consciousness.

Heat stroke can occur when your body heats up to over 104 degrees. If you’re over 50 years old or have a pre-existing heart condition, Dr. Narula says you should speak to your doctor about if you need to be outdoors in the heat for extended periods of time – but young people need to be careful as well.

Heat exhaustion, while less severe, is also a concern in the summer.

“Limit your times outdoors as much as possible if you’re able to,” says Dr. Narula.