It’s going to be hot and sticky in New York City on Sunday as temperatures are expected to soar into the 90s in the first heat wave of the season.

Monday and Tuesday are expected to be even hotter. Many locations in the metro area will likely climb into the high 90s and potentially break 100 degrees. High temperatures would normally range from 80 to 85 this time of the year.

The National Weather Service issued an extreme heat warning, the highest level of heat alert, for the city, from noon on Sunday through 8 p.m. on Tuesday.

The stifling weather is predicted to create life-threatening conditions, particularly for older people and anyone without access to air-conditioning.

“Heat like this can kill,” New York City Emergency Management said on social media. “It is the deadliest weather hazard we face.”

Temperatures are forecast to peak on Monday and Tuesday.

Sunday will be the start of what could be a record-setting heat wave for the New York City metro area.