Excessive Heat Warning in Effect for Nassau, Heat Index Could Hit 110 Degrees

The National Weather Service has issued an excessive heat warning for Nassau County, in effect until 10 p.m. Sunday.

High temperatures will be in the low to mid-90s on Friday, Saturday and Sunday, but the heat index (how hot it really feels when the humidity is factored in) will soar past 100 degrees, the National Weather Service says.

The heat index will be between 105-110 degrees on Friday and Saturday afternoons. On Sunday afternoon, it will be between 100-105 degrees.

The combination of the heat and humidity will increase the risk for heat-related health issues, especially
for the elderly, those with chronic health problems such as lung and heart disease, those working outdoors and other heat sensitive groups of people, the NWS says.

Nassau County Executive Ed Mangano has announced that cooling centers are open to the public.

“The combination of heat and humidity can become unbearable and dangerous for many of our residents,” Mangano said. “I encourage residents to take precautions and visit one of our many cooling centers and pools if they need relief from the heat.”

The following cooling center – offered by Nassau County is open daily, from 9 a.m. - 4:45 p.m.:

• Mitchel Field Administration Center - 1 Charles Lindbergh Blvd., Uniondale - 516-572-0400

The following location, offered by the Town of Oyster Bay, is be open Friday only, August 12th, from 9 a.m. - 7 p.m.:

• Hicksville Community Center, 28 West Carl St., Hicksville

The Nassau County Department of Health also offers the following information for residents to protect themselves and others during high temperatures:

• Check on relatives and friends, especially the elderly.
• Increase time spent in an air-conditioned environment.
• Drink fluids – especially water. Avoid beverages that contain alcohol.
• Take cool baths.
• Individuals especially at risk, such as the elderly or those with chronic illnesses should refrain from physical activity, avoid being alone, keep their sleeping area well ventilated, and avoid falling asleep in a hot room.
• Eat light, but nutritious foods.
• Avoid the sun at the hottest times of the day.
• Wear a hat and light, loose-fitting clothing.

Find more heat safety tips here.

There's a 30-40 percent chance of showers and thunderstorms through the weekend. Any thunderstorms that develop will be capable of producing torrential rainfall and localized flash flooding, the NWS says.

Here's Friday's hour-by-hour forecast:

11 a.m.- 88 degrees, heat index- 98 degrees

Noon- 91 degrees, heat index- 102 degrees

1 p.m.- 93 degrees, heat index- 105 degrees

2 p.m.- 94 degrees, heat index- 106 degrees

3 p.m.- 94 degrees, heat index- 106 degrees

4 p.m.- 93 degrees, heat index- 103 degrees

5 p.m.- 92 degrees, heat index- 102 degrees

6 p.m.- 89 degrees, heat index- 98 degrees

7 p.m.- 87 degrees, heat index- 95 degrees

8 p.m.- 86 degrees, heat index- 94 degrees

9 p.m.- 85 degrees, heat index- 93 degrees

10 p.m.- 84 degrees, heat index- 91 degrees

11 p.m.- 83 degrees, heat index- 90 degrees