Sunday was hot. Really hot. But somehow not quite record-setting.
Even as it felt like 109 degrees outside, Sunday's high temperature was only 99 degrees, cooler than both the record for the same day and the hottest day ever recorded in Islip, according to the National Weather Service.
On the same day in 1991, the mercury hit 101 at Long Island MacArthur Airport. That was still below the record, set on July 3, 1966, for the highest temperature ever recorded at the airport: 104.
Sunday was not even the most sweltering day of the weekend. While it beat Saturday's high temperature of 97 – which matched 1991's record for the hottest July 20 ̵
But below-record heat still caused problems.
Thousands of consumers were without electricity Sunday as the heat wave caused scattered outages, officials said.
At the height of the outages, nearly 6,000 customers did not have electricity around 7:30 pm. Sunday, according to PSEG Long Island. This figure dropped to around 3,500 customers around 8:15 pm
More than 600 crews were working to address Sunday night outages, PSEG LI spokeswoman Elizabeth Flagler said
"We are right in the top right now, but we have been able to stay right on top of the outages as they come in, "Flagler said, adding there is" hardly any backlog. "
An outage map showed some customers were expected to have power restored by 4 am Monday, though Flagler said electricity could be back earlier than the estimated times.
Earlier Sunday, the utility company had estimated power to be restored by 6:15 pm for Nassau and Suffolk and 4 p.m. for the Rockaway Peninsula
The National Weather Service expected to keep an excessive heat warning in effect through 9 pm
The weather service warned that extreme heat can quickly cause heat exhaustion or heat stroke among the at-risk population who
Symptoms of heat exhaustion may include a cold, moist skin with gore bumps when in the heat, heavy sweating, faintness, dizziness, fatigue, weak, fast pulse, low blood pressure upon standing, muscle cramps, (19650019)  in sweating, nausea and vomiting, flushed skin, rapid breathing, racing heart rate and a headache, according to the Mayo Clinic.
Hospitals have seen an increase in heat-related patients over the weekend, according to Catholic Health Services of Long Island
"We have treated an increased number of patients with heat-related complaints yesterday [syncope, fatigue, dehydration]," said Dr. Christopher Raio, the Rockville Center-based agency's chair of emergency medicine. "Some do work outdoors, some from the beach, and a few elderly with no AC at home.
Northwell spokeswoman Diane O'Donnell said on Sunday, "So far we have had 30 patients," said Kaly Chan, a spokeswoman for Kali Chan. come to our Long Island EDs yesterday from heat-related complaints with eight admitted. "
While the temperature soars in the mid-90s, even the low temperatures are high
According to National Weather Service, Saturday night's low of 78 degrees was a record high temperature tied to the record for that date set on July 20, 2013. A weather service spokesman said that temperature has been tied a few times since 2013.
George Gorman, regional director for Long Island for the State Office of Parks, Recreation and Historic Preservation, said state parks and beaches were crowded Saturday but did not reach capacity and he expected the same for Sunday. A spokeswoman for Nassau County also said its beaches were not at capacity