The National Weather Service issued a heat advisory for most of Long Island for July 18, 2020. NWS photo

A scorching summer weekend is on tap for Long Island ahead of temperatures forecast to approach 100 degrees on Monday, experts say.

The National Weather Service (NWS) issued a heat advisory Friday for Nassau and the western half of Suffolk counties. The advisory is in effect from 12 p.m. Sunday to 8 p.m. Monday.

“High temperatures and high humidity may cause heat illnesses to occur,” Upton-based NWS meteorologists said in a statement.

A heat advisory is issued when the combination of heat and humidity is expected to make it feel like it is 95 to 99 degrees for two or more consecutive days, or 100 to 104 degrees for any length of time.

Saturday is forecast to be mostly in the lower 90s, but could potentially reach 95 in a few spots. Heat then climb into the mid to upper 90s on Sunday, then around 100 on Monday. The heat and humidity probably continues into Tuesday with heat in low to mid 90s, the agency said.

NWS advised the public to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. It also issued a reminder that young children and pets should never be left unattended in vehicles under any circumstances.

In addition, anyone who works or plans to spend time outside is advised to take extra precautions, reschedule strenuous activities to early morning or evening, wear lightweight and loose fitting clothing, and know the signs and symptoms of heat exhaustion and heat stroke.  

Officials warned that the beaches are sure to fill up even more quickly than usual this weekend and traffic is expected near oceanfront parks, considering the heat and reduced capacity due to the coronavirus pandemic. 

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