Predictions of a hot summer are coming true with temperatures already exceeding 90 degrees several times.

The extreme heat and high humidity can lead to serious health issues. Know the symptoms of heat exhaustion and heat stroke.

Heat stroke occurs when the body is unable to regulate its temperature, according to the CDC. Symptoms include high body temperature; red, hot, and dry skin with no sweating; rapid, strong pulse; throbbing headache; dizziness; nausea; and confusion or unconsciousness.

Get immediate medical attention if you see someone with these symptoms.

Heat exhaustion is a milder form of heat-related illness that can develop after several days of exposure to high temperatures and inadequate or unbalanced replacement of fluids, the CDC says. It is the body’s response to an excessive loss of the water and salt contained in sweat. Those most prone are the elderly, those with high blood pressure and people working or exercising in a hot environment.

The CDC reported the symptoms include heavy sweating, paleness, muscle cramps, tiredness weakness, dizziness, headache, nausea or vomiting and fainting.

Don’t leave children or pets unattended inside a vehicle. Keep an eye on outdoor pets. Make sure they have shade and plenty of fresh water. Drink plenty of water and nonalcoholic beverages. Dress in cool, light-fitting clothes. Wear a hat and use plenty of sunscreen.

Find a cool place during the hottest time of the day. There are still plenty of hot days ahead. Make sure to take the proper precautions.