The National Weather Service has issued a heat advisory for New York City and the suburban counties.
On Saturday, a high of around 94 is predicted with a heat index as high as 101 degrees.
But heavy rain is expected, and that should cause gradual cooling starting on Sunday.
The recent extreme heat has resulted in the death of at least one New Yorker.
A 57-year-old man from Staten Island died on July 8, 2013, from hyperthermia, according to the Chief Medical Examiner.
A cold front could bring storms and relief on Saturday night.
The Office of Emergency Management (OEM) has air-conditioned cooling centers throughout all five boroughs.
Many senior and community centers serve as cooling centers. New Yorkers can call 311 or log on to www.NYC.gov/oem to find the nearest cooling center. Call your local cooling center to confirm hours of operations.
For information on New Jersey cooling centers, visit: www.state.nj.us/njoem.
In Connecticut, people can call 1-800-830-9426, or 911 in an emergency.
OEM also offers the following tips to help people stay safe:
Energy Conservation and Power Outages
During periods of hot and humid weather, regional electricity use rises. Residents should conserve energy to help prevent power disruptions.
Fire Hydrants and Spray Caps
Opening fire hydrants without spray caps is wasteful and dangerous. Illegally opened hydrants can lower water pressure, which can cause problems at hospitals and other medical facilities and hinder fire-fighting by reducing the flow of water to hoses and pumps. Children can also be at serious risk, because the powerful force of an open hydrant without a spray cap can push them into oncoming traffic. Call 311 to report an open hydrant.
Hydrants can be opened legally if equipped with a City-approved spray cap. One illegally opened hydrant wastes up to 1,000 gallons of water per minute, while a hydrant with a spray cap only puts out around 25 gallons per minute. Spray caps can be obtained by an adult 18 or over, free of charge, at local firehouses.
Residents can learn more about how to stay cool all summer long with OEM's Ready New York: Beat the Heat guide. For more information about heat-related hazards and the Ready New York campaign, call 311 or visit www.NYC.gov/oem.
To find a cooling center, call 311 or log on to www.nyc.gov/oem.