While working on the Route 347 improvement project underway between...

While working on the Route 347 improvement project underway between Nesconset and Lake Grove, construction worker James Hamill, of Sagaponack, wipes the sweat from his face as he and other people working outdoors dealt with the high temperatures that settled over Long Island on Thursday, Aug. 4, 2022. Credit: Newsday/John Paraskevas

Long Islanders who sweated through high temperatures and humidity Thursday can expect to get more of the same Friday with barely a touch of relief Saturday before heat is turned full up again Sunday and for the start of the new workweek Monday.

The National Weather Service on Thursday evening said a heat advisory declared Thursday morning will remain in effect until 8 p.m. Friday. The conditions pose a danger of heat-related illnesses, including heat stroke.

"Seniors and those with chronic health problems or mental health conditions are at an increased risk," the weather service says.

The service further noted that the Occupational Safety and Health Administration recommends that those who work outdoors take frequent rest breaks in shaded or air conditioned environments.

Thursday, the high temperature at Islip was 90 degrees at 1:16 p.m., just one degree shy of the record high of 91 last reached in 2006. 

Friday, the temperature is expected to reach a high of about 89 degrees and the heat index, a measure of how it really feels when relative humidity is factored in with the air temperature, could be near 95 degrees, the weather service said.

Friday also brings a 30% chance of showers and thunderstorms after 2 p.m., but otherwise the day should be partly sunny. A southwest wind of 5 to 9 mph is predicted.

Construction worker James Hamill of Sagaponack wipes the sweat from his face...

Construction worker James Hamill of Sagaponack wipes the sweat from his face while working in the heat Thursday on the Route 347 improvement project between Nesconset and Lake Grove. Credit: Newsday/John Paraskevas

Friday night into Saturday, there will be a 50% chance of showers and thunderstorms, mainly before 2 a.m.

Saturday, there will be a 40% chance of precipitation, mainly after 8 a.m., with mostly cloudy skies and a high temperature near 87 and a heat index again near 95.

Forecasters said the high temperature Sunday will be about 89 degrees, with a 30% chance of showers and thunderstorms after 2 p.m.

"Additional heat advisories may be needed Sunday into early next week," according to the weather service's regional forecast.

Monday has a 30% chance of showers. Chances of rain are also in the Tuesday and Wednesday forecasts before Long Island gets a partly sunny Thursday.

The high temperature will be about 90 degrees on Monday, and in the mid to high 80s through Thursday, according to the weather service.

To beat the heat, cooling centers will be open and some municipalities are extending pool and beach hours:

NASSAU COUNTY

  • Cantiague Park Administration Office, 480 W. John St., Hicksville. Open 8 a.m. to 6 p.m.
  • Wantagh Administration Building, 1 King Rd., Wantagh. Open 8 a.m. to 6 p.m.
  • Mitchel Field, 1 Charles Lindbergh Blvd., Uniondale. Open 24 hours

Anyone at the Cantiague Park and Wantagh cooling centers at closing time will be transported to Mitchel Field.

HEMPSTEAD

Cooling centers will operate out of select Town of Hempstead senior centers from 9 a.m. to 4 p.m. Thursday and Friday at the following locations:

THURSDAY

  • Elmont Senior Center, 138 Elmont Rd., Elmont
  • Franklin Square Senior Center, 1182 Martha Place, Franklin Square
  • Green Acres Senior Center, 400 Flower Rd., Valley Stream
  • Levittown Senior Center, 555 N. Newbridge Rd., Levittown
  • Oceanside Senior Center, 2900 Rockaway Ave., Oceanside
  • Rosa Parks Senior Center, 2 Babylon Turnpike, Roosevelt
  • Salisbury Senior Center, 460 Salisbury Park Drive, Westbury
  • Uniondale Hempstead Senior Center, 840 Uniondale Ave., Uniondale
  • Uniondale Merrick Senior Center, 750 Jerusalem Ave., Uniondale
  • Wantagh Senior Center, 1150 Seamans Neck Rd., Wantagh

FRIDAY

  • Baldwin Senior Center, 1810 N. Grand Ave., Baldwin
  • Bellmore Senior Center, 2000 Bellmore Ave., Bellmore
  • Elmont Senior Center, 138 Elmont Rd., Elmont
  • Levittown Senior Center, 555 N. Newbridge Rd., Levittown
  • Oceanside Senior Center, 2900 Rockaway Ave., Oceanside
  • Rosa Parks Senior Center, 2 Babylon Turnpike, Roosevelt
  • Salisbury Senior Center, 460 Salisbury Park Drive, Westbury
  • Uniondale Hempstead Senior Center, 840 Uniondale Ave., Uniondale
  • Uniondale Merrick Senior Center, 750 Jerusalem Ave., Uniondale
  • Wantagh Senior Center, 1150 Seamans Neck Rd., Wantagh

Beach hours will be extended to 7 p.m., while pools will be open until 8 p.m.

BROOKHAVEN

The Town of Brookhaven will have lifeguards on duty at the following beaches until 7 p.m. Thursday and Friday:

  • Cedar Beach in Mt. Sinai
  • West Meadow Beach in Stony Brook
  • Corey Beach in Blue Point
  • Davis Park on Fire Island

The Holtsville and Centereach pools will also be open until 7 p.m. each day.

HUNTINGTON

  • Dix Hills Pool and lobby of Clark Gillies Arena (formerly Dix Hills Ice Rink), 575 Vanderbilt Parkway, Dix Hills. Open 12:30 p.m. (after camps end) to 8 p.m.
  • Sgt. Paul Tuozzolo Memorial Spray Park, Cuba Hill Road (between Harmon Drive and Elwood Road), Elwood. Recreation ID Card requirement waived. Open 11 a.m. to 8 p.m. for general public, 10 a.m. to 11 a.m. Thursday for children with special needs.
  • John J. Flanagan Center/Senior Center, 423 Park Avenue, Huntington. Open 10 a.m. to 4:30 p.m.
  • Manor Field Spray Park, E. 5th Street (between Park Avenue and Lenox Road), Huntington Station. Recreation ID Card requirement waived. Open 11 a.m. to 8 p.m., 10 a.m. to 11 a.m. Thursday for children with special needs.

All Huntington cooling centers will be open to town residents only. Town of Huntington beaches will have extended lifeguard protection until 7 p.m.