Sunday’s heat broke records in the metro area, including Long Island, the National Weather Service said.

Islip peaked at 90 degrees, a record for the date, with LaGuardia Airport peaking at 94 degrees, the weather service said. The humidity, however, was relatively low, around 50%.

Monday will be slightly cooler, with a high of 85 degrees, and daytime highs will be between 80 and 80 degrees until Thursday, when conditions cool. Nightly lows will be between 60 and 60 degrees, according to forecasts.

An air quality alert was in effect until 11 p.m. Sunday for Nassau and Suffolk counties with high pollutant levels.

On Tuesday, there is a risk of thunderstorms in the afternoon, increasing to 60% in the evening.

The temperature climbs to 87 Wednesday with a 50% chance of thunderstorms overnight, while a low of 64 is expected.

Thursday brings more sun and a maximum in the upper 70s and a nighttime low of 59.

Clouds bring cooler temperatures on Friday. The maximum will reach 73 before the temperature drops to 57 overnight, according to the weather service.