New Yorkers don’t need a weather app to tell them that it’s currently hotter than Death Valley, CA in NYC right now–stepping outside for just three seconds is enough to leave us drenched. And while we hate to be the bearers of bad news, the upcoming holiday weekend is about to turn up the dial even further.
New York City is currently trapped under a dangerous “heat dome,” prompting the National Weather Service to issue an Extreme Heat Warning through 9 pm on Friday, July 3, followed by an Extreme Heat Watch extending through 9 pm on Saturday, July 4.
With this historic heat wave sending temperatures soaring across the five boroughs, Mayor Zohran Mamdani is warning residents that this Fourth of July could officially be NYC’s hottest since 2010, when the city hit a scorching 97°F.
Mamdani stated during a press conference:
Beginning [Wednesday, July 1, 2026], NYC will enter a heat emergency that will last through the Fourth of July weekend. Temperatures will climb into the high 90s and triple digits. With humidity it will feel even hotter, with a heat index that could peak around 112º. If the forecast holds, this could be the hottest Fourth of July since 2010. These are extremely dangerous conditions, and they will affect every part of our city.
🥵 Exactly How Hot Will It Get For The 4th Of July Holiday Weekend?
According to the National Weather Service and city officials, the air temperatures are only half the story. The oppressive humidity is going to create a sky-high heat index (what it actually feels like outside):
- Wednesday, July 1: Daytime highs in the upper 90s/near 100°F; heat index between 100°F and 105°F
- Thursday, July 2: Air temperatures around 100°F; heat index between 103°F and 108°F (This could mark the first official 100-degree day recorded in Central Park since July 18, 2012)
- Friday, July 3 – Saturday, July 4: Triple-digit heat index values will persist, with Mayor Mamdani warning that the “feels like” temperature could peak as high as 112°F
For Context: The hottest Fourth of July in NYC history was all the way back in 1949, when the thermometer hit 102°F. While we might not break that 77-year air temperature record, the humidity means it’s going to feel just as brutal.
🎆 How This Affects Your 4th Of July Plans
On Tuesday, June 30, Mayor Zohran Mamdani activated an unprecedented, historic Heat Emergency Plan to ready New Yorkers.
If you’re planning to head out for backyard BBQs, beach trips, or the Macy’s Fireworks, the city’s heat plan has changed a few things you need to know:
- Extended Pool Hours: Olympic- and intermediate-sized NYC public outdoor pools are extending their hours and will stay open until 8 pm through Saturday.
- Free Fire Hydrant Sprinklers: Adults 18 and older can walk into any local FDNY firehouse with a valid ID and request a free, city-approved spray cap to safely turn their block’s hydrant into a neighborhood sprinkler
- Cooling Centers are Open (Including the Javits Center): Hundreds of cooling centers are open citywide at public libraries, schools, and older adult centers. Additionally, the Javits Center and NYCEM Headquarters will be open as cooling centers from 11 am to 11 pm from July 3 through July 5. You can find pet-friendly and accessible options using the City’s Cool Options Map or by calling 311
- Real-Time Directions via LinkNYC: If you’re out and about and overheating, look for any of the 2,200+ LinkNYC kiosks. They’re now actively displaying real-time walking directions to the closest cooling center within a 10-minute walk
🪭 Mobile “COOL” Vans & Outdoor Worker Support
To protect the city’s most vulnerable, NYC Health + Hospitals is deploying COOL vans stocked with water, electrolytes, sunscreen, and cooling towels, while medical teams conduct wellness checks on older adults.
Pop-up cooling stations equipped with misting fans are also being deployed across the boroughs to give vital relief to outdoor workers, including street vendors and delivery workers.
Because the intense heat could trigger sudden holiday weekend thunderstorms, the city has also activated its Flash Flood Plan as a precaution.
💙 Stay Safe, New York
Officials are urging everyone to limit strenuous outdoor activity during peak afternoon hours, stay hydrated, and look out for signs of heat exhaustion (dizziness, nausea, heavy sweating) or heat stroke (confusion, hot/dry skin), which requires calling 911 immediately.
To stay completely up to date with changing weather alerts through the holiday weekend, text NOTIFYNYC to 692-692 or visit nyc.gov/beattheheat.
See Mamdani’s full press conference below:
