Weather Alert Issued For NYC As Heavy Rains and Localized Flooding Head to the City Monday
The New York City Emergency Management Department (NYCEM) is advising New Yorkers to prepare for periods of heavy rain, scattered thunderstorms, and the potential for localized flash flooding on Monday, August 3, as a weather system moves through the region.
According to the National Weather Service (NWS), isolated showers may develop on Sunday, before a low-pressure system approaches the region on Monday. Showers are expected to become more widespread Monday morning, with the greatest risk for heavy rainfall and thunderstorms expected between 10 a.m. and 6 p.m. While rain is not expected to fall throughout the day, individual thunderstorms may produce rainfall rates of 1 to 2 inches per hour, which could lead to isolated to scattered instances of flash flooding of urban, poor drainage, low-lying areas, and along quick-responding streams. Showers are expected to dissipate early Monday evening.
“Summer storms can arrive with little warning, bringing flash flooding, downed tree limbs and dangerous lightning,” said Mayor Zohran Mamdani. “ I urge every New Yorker to stay alert, take these storms seriously and head indoors when conditions become unsafe. The best way to protect yourself and your loved ones is to stay informed — sign up for emergency alerts by texting NOTIFYNYC to 692-692.”
“While the forecast continues to evolve, now is the time for New Yorkers to prepare,” said NYC Emergency Management Commissioner Christina Farrell. “Heavy rainfall can quickly create dangerous travel conditions and flash flooding. We encourage everyone to stay informed, plan ahead for Monday’s commute, and never drive or walk through flooded roadways. New Yorkers in basement apartments should know their exits now and be ready to move to a higher floor when heavy rain begins.”
The region is also under a marginal risk of severe thunderstorms on Monday. The strongest storms could bring gusty winds, lightning, and brief heavy downpours. Wind gusts of 60mph are possible in any stronger storms, which could damage trees and power lines and result in power outages. Stay informed by checking the forecast at weather.gov/nyc and signing up for emergency alerts at nyc.gov/notifynyc.
NYCEM has activated the city’s Flash Flood Emergency Plan, coordinating closely with NWS, city and state agencies, utility providers and private sector partners. This proactive approach includes pre-storm actions, such as targeted inspections and clearing of catch basins in flood-prone areas by agencies like the Department of Environmental Protection and the Department of Transportation, to help reduce street flooding before heavy rain begins. The Downed Tree Task Force has been put on alert to respond to any fallen trees or branches, as well as the Tow Truck Task Force to assist with any stranded vehicles. Coordinated interagency calls ensure partners are briefed on emerging risks and prepared to escalate response operations as needed, while specialized emergency assets and response teams remain on standby for rapid deployment. NYCEM’s 24/7 Watch Command continuously monitors weather conditions and tracks developing systems in real time.
New Yorkers should allow extra travel time during periods of thunderstorms and heavy rain. Do not remain in or return to areas or buildings that are flooding, and do not drive through flooded streets. Even shallow water can stall vehicles. Secure loose outdoor items such as patio furniture or trash bins before winds increase. If thunder is heard, move indoors and stay away from open areas. Clear debris from nearby storm drains if it is safe to do so to help reduce street flooding.