The heatwave that has set temperatures soaring across New York has already broken records in several areas but conditions are set to get even hotter today.

On Monday, the record high for June 23 at Central Park was tied at 96 degrees, the last time 96 degrees was reached on this date was back in 1888, according to the National Weather Service. Meanwhile, Islip reached a record 93 degrees, beating the previous record of 91 in 1999.

A State of Emergency was declared in 32 New York counties as officials warned residents of the dangers of heat - the top weather-related killer. But the worst is yet to comes as forecasters say the heatwave will peak on Tuesday, climbing into triple digits.

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Extreme heat will continue on Tuesday as the National Weather Service (NWS) has issued Extreme Heat Warnings and Heat Advisories for the entire area. Temperatures will peak at 103 degrees as more record highs are expected to be broken in several areas across the tri-state.

The "feels like" temperature will be even hotter. Dangerously hot conditions will see heat index values up to 110 degrees, the NWS warns.

The heat index indicates what a given temperature will feel like by taking the dew point into account. The dew point is the amount of humidity in the atmosphere and the higher it is, the hotter it will feel. By Tuesday afternoon, the dew point will be about as high as it ever is in the region.

The extreme heat warning is in place until 8pm Tuesday. While temperatures will be lower on Wednesday, extreme heat is still possible, the NWS says.

High temperatures will stay above 90 degrees throughout Wednesday as the heat index reaches 100 degrees. It's not until late Wednesday and into Thursday that conditions finally begin to cool down.

By Thursday, highs will have fallen to the 80s and the upper 70s for the coast. The cooldown will continue into Friday as temperatures drop to the mid-70s. As the heat weakens, a stormy summertime weather pattern is forecast, bringing storm chances for most of the second half of the week and into the weekend.

"Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities," the NWS warns.

The agency has urged New Yorkers to take extra precautions if you work or spend time outside. "When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing when possible, and drink plenty of water," they said.

They also warned that seniors and those with chronic health problems or mental health conditions are at an increased risk and urge people to check on vulnerable friends, family members and neighbors.

The agency added: "Homes without air conditioning can be much hotter than outdoor temperatures. Use air conditioning to stay cool at home or go to a place that has air conditioning. If you don`t have home air conditioning, continue to seek out cool spaces each day as long as it remains hot, and for a few days after if your home is still hot.

"To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1."

The heatwave is being caused by a large area of high pressure sitting over the eastern half of the country.

As the high-pressure system stalls, it acts as a heat pump, creating a dramatic rise in temperatures. While New York has experienced heat domes before, this level of heat hasn't been seen in the Tri-State area for years.

Central park has not reached 100 degrees since 2012 as triple digits aren't reached very often in the region.