NEW YORK - New Yorkers are being urged to take precaution as temperatures are expected to soar above 90 degrees for most of the rest of the week.

Temperatures will likely approach 100 over the weekend with the heat and humidity making it feel even hotter.

Relief from the dangerously hot temperatures will likely not come until next week with a chance of rain on Monday.

The city says 500 cooling centers are open across the five boroughs for New Yorkers that do not have air conditioning.

They will be at places like libraries, community centers, senior centers, and city public housing facilities.

To find one call 311 or visit maps.nyc.gov.

City pools will be open an extra hour from 11 a.m. to 8 p.m., and beaches will be open until 7 p.m. during the weekend.

Mayor Bill de Blasio says there is also a "Code Red" in effect citywide, meaning outreach teams will be dispatched to help members of the city's homeless population.

New Yorkers should also conserve energy as demand will be higher during the extreme heat.

Air conditioners should be set no lower than 78 degrees when in use, and turned off when no one is home.

The Department of Environmental Protection will have Water-on-the-Go portable drinking water fountains positioned at busy pedestrian areas across the five boroughs from Friday to Sunday.

“Extreme heat is dangerous, period,” said Mayor Bill de Blasio. "I urge all New Yorkers to exercise caution this weekend as temperatures near 100. Look out for your neighbors, friends and family and call 311 to find a cooling center. We are deploying all resources at our disposal to ensure New Yorkers remain safe and cool during extreme heat."

For those looking to beat the heat in the streets, residents are reminded to get FDNY approved hydrant caps from their local firehouse.

Additional heat tips from the mayor's office:

HEALTH AND SAFETY TIPS FOR PROTECTION AGAINST THE HEAT:

• Go to an air-conditioned location, even if for a few hours.

• Stay out of the sun and avoid extreme temperature changes.

• Drink water

• Wear lightweight, light-colored clothing when inside without air conditioning or outside.

• Protect your pets and service animals when extreme heat strikes:

• Never leave pets in the car. Temperatures rise quickly even with the windows down and can be deadly for your pet. Call 911 if you see a pet or child in a hot car.

• Be sure your pets have access to plenty of water, especially when it is hot.

• Participate in activities that will keep you cool, such as going to the movies, shopping at a mall, or swimming at a pool or beach.

• Make sure doors and windows have tight-fitting screens and, in apartments where children live, window guards.

• Never leave your children or pets in the vehicle, even for a few minutes.

• Check on your neighbors during a heat wave, especially if they are seniors, young children, and people with disabilities.

KNOW THE WARNING SIGNS OF HEAT ILLNESS:

Call 911 immediately if you or someone you know has:

• Trouble breathing.

• Hot dry skin

• Rapid heartbeat.

• Confusion, disorientation, or dizziness.

• Nausea and vomiting.

If you or someone you know feels weak or faint, go to a cool place and drink water. If there is no improvement, call a doctor or 911.