Here are the symptoms of heat-related illnesses and tips for keeping cool, according to health experts.

BALTIMORE – Extreme temperatures can pose a real health threat, especially for the elderly, children and pets.

Baltimore City Health Officer Dr. Ihuoma Emenuga on Friday extended the extreme heat warning “Code Red” through Monday, July 8.

Lakeisha Berry: “It’s humid and hot, but we just try to stay hydrated,” says Lakeisha Berry, a Baltimore resident.

To ensure people stay cool as temperatures rise, Baltimore Rec and Parks has extended the hours of swimming pools across the city.

“Going to the pool, staying indoors, drinking lots of water … for the most part we’re just trying to stay cool,” Berry said.

In addition, several cooling centers are open throughout the city.

What are the symptoms of heat-related illnesses?

WJZ spoke with Dr. Danielle Warren of Carroll Hospital, who emphasized the importance of paying attention to the symptoms of heat illness.

“Symptoms of heat illness include dizziness, nausea and shortness of breath,” Dr. Warren explained.

The Baltimore City Health Department also advises seeking help in the following cases:

The symptoms of heat illness can become severe and, if left untreated, can lead to heat stroke, possible confusion and loss of consciousness.

How can I prevent heat-related illnesses?

“Reduce your exposure to heat. Make sure you drink plenty of fluids and eat something every few hours,” Warren advises. “If you drink alcohol, you become more sensitive… and so does anyone who exerts themselves.”

The NWS recommends taking a 45-minute rest after training or exercise of 15 minutes or more in the sun.

Doctors also recommend wearing light, loose-fitting clothing and taking frequent breaks when using air-conditioned equipment.

City residents seeking information about cooling centers on days with an Extreme Heat Warning (Code Red) can call 311.

Anyone experiencing a heat-related medical emergency or showing signs of heat exhaustion or heat stroke should call 911.