The National Weather Service (NWS) in New York has issued an Extreme Heat Warning and an Extreme Heat Watch as a prolonged period of dangerously high temperatures is expected to begin Sunday, June 22, 2025, and continue through early next week. Confidence in the forecast is high, with the most intense heat anticipated on Monday and Tuesday.
Meteorologists express high confidence in this forecast, which includes dangerously high temperatures and oppressive humidity across the region. An Extreme Heat Warning is now in effect from 12 PM Sunday through 8 PM Tuesday for Northeast New Jersey, the Lower Hudson Valley, and most of Southern Connecticut, while an Extreme Heat Watch remains in place for New York City, portions of Long Island, and coastal New London County.
Temperatures are expected to climb into the mid to upper 90s, with some areas potentially reaching 100°F. When combined with high humidity, the maximum heat indices could soar to between 105 and 110°F, creating hazardous conditions that increase the risk of heat-related illnesses. The peak of this heat wave is forecast for Monday and Tuesday, when conditions will be most intense. In addition to the heat, there is a marginal risk for a severe thunderstorm late Saturday night into Sunday morning, which could bring localized impacts such as strong winds or heavy rain.
The extreme heat poses significant risks, particularly for vulnerable populations, outdoor workers, and those without access to air conditioning. The NWS strongly recommends taking precautions, such as staying hydrated, avoiding strenuous outdoor activities during the hottest parts of the day, and checking on neighbors or pets who may be at risk. Residents are also encouraged to seek air-conditioned spaces or utilize local cooling centers if needed.
Meanwhile, New York City Mayor Eric Adams and New York City Emergency Management Commissioner Zach Iscol have reminded New Yorkers to make a plan and prepare for extreme weather. They emphasize knowing cooling options and referring to NYCEM’s robust, proactive safety plan to protect New Yorkers from extreme heat. As the city experiences more extreme weather events, individuals with chronic health illnesses, mental health conditions, substance or alcohol abuse, and older adults are more likely than younger New Yorkers to experience adverse effects from extreme heat. This is because, as people age, their ability to maintain a safe body temperature declines, increasing their risk for heat-related illness. New York City urges residents to take steps to protect themselves and help others who may be at increased risk from the heat, including vulnerable individuals such as seniors and those with chronic health problems.
Mayor Adams stressed, “New York City has a plan to beat the heat — so know your ‘Cool Options.’ Extreme heat will not just be uncomfortable and oppressive for New Yorkers this coming week; it will be brutal and it will be dangerous. Whether it is an air-conditioned space, such as your home, a friend’s or family member’s home, a library, or a museum, find a way to stay cool. Stay hydrated, check on your elderly family members and neighbors, and make sure your pets have all the water they need. By acting smart, we will get through this heat.”
NYCEM Commissioner Iscol added, “Summer in the city is a time to enjoy the outdoors, but we must also prepare for the challenges that heat can bring. Extreme heat can be a serious public health risk in communities already facing health and housing challenges, so it’s important for New Yorkers to know their cooling options, check in on neighbors who may be more vulnerable to heat illness, and prepare now, so they’re ready for the warmer days ahead. That includes expanding access to cooling centers and focusing our outreach to communities where the heat hits hardest.”
Dr. Michelle Morse, Acting Commissioner of the New York City Department of Health and Mental Hygiene, emphasized the importance of staying cool: “It is essential to stay cool during hot weather — use air conditioning or go to a cool place where you feel comfortable. Heat is dangerous, but taking certain precautions can prevent illness and protect your health. Remember to stay hydrated with water or electrolyte drinks — even when you don’t feel thirsty — and minimize caffeine and avoid alcohol. It’s also important that we take care of one another by checking in on family, friends, and neighbors — especially older adults.”
NYCEM has released “Beat the Heat,” an instructive guide for New Yorkers to navigate extreme heat this summer. During heat emergencies, New York City will activate its extensive network of cooling centers to provide indoor, cooled spaces as a respite from dangerous outdoor temperatures. NYCEM has also expanded its partnerships to offer a wider range of cooling centers throughout the city, including new cultural sites and elected officials’ offices, ensuring more options for residents. Through a partnership with PetCo, the city will also provide numerous pet-friendly cooling centers for New Yorkers. Additionally, the city is working with food partners like City Meals on Wheels and City Harvest to distribute heat safety information to vulnerable populations through Heat Preparedness Messaging.
Those most vulnerable to heat stress include adults aged 60 and older and people with health conditions, including heart disease, diabetes, mental health conditions, or people with cognitive impairment. Safety tips include: checking on at-risk individuals and helping them find a cool place to stay; going to an air-conditioned location, even for a few hours; staying out of the sun and avoiding extreme temperature changes; avoiding strenuous activity, especially during peak sun hours (11:00 AM to 4:00 PM); drinking water every 15 minutes even if not thirsty; resting in the shade; avoiding alcohol or caffeine; eating small, frequent meals; wearing lightweight, light-colored clothing; visiting places like museums, malls, or public pools to stay cool; and never leaving a child or pet in a car, even briefly.
It’s advised to call 911 immediately if someone has: hot, dry skin; trouble breathing; a rapid heartbeat; confusion, disorientation, or dizziness; or nausea or vomiting. If someone feels weak or faint, they should go to a cool place and drink water. If symptoms persist, seek medical attention.
If working outdoors during extreme heat, it’s advised to remember to drink water every 15–20 minutes and rest in the shade. Dress in light, loose-fitting clothing and use SPF 15+ sunscreen. It’s advisable to reschedule or reduce heavy labor between 11:00 AM and 4:00 PM, use the buddy system, and monitor for signs of heat illness. Employers are required to provide water, rest, and shade.
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Kishor Panthi
View More PostsKishor Panthi is the founder and editor-in-chief of Khasokhas and NepYork. He is the author of three books, “Kampan,” "UNTRANSLATABLE" and “Zero Mile.” He writes about social issues, immigration, and politics.
