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5 Towns Central

Heavy Rainfall & Severe Thunderstorms Prompt Regional Flood Alert Across New York City Area

Jul 21, 2026·2 min read

By 5 Towns Central Staff

NEW YORK, N.Y. (July 21, 2026) — Heavy downpours and severe weather are set to impact the metropolitan region, triggering an official flood alert that remains active through early Wednesday morning. Weather advisories indicate that a powerful storm system will bring widespread precipitation ranging from one to two inches across the city, with localized pockets potentially experiencing significantly higher accumulations in short spans of time.

The deluge is projected to begin during the morning hours on Tuesday and intensify throughout the afternoon and evening commute. Heavy rainfall, accompanied by intense localized thunderstorms, presents a heightened risk of rapid water accumulation on roadways, major highways, low-lying expressways, and urban underpasses. Areas suffering from poor drainage infrastructure are particularly vulnerable to sudden flash flooding and significant travel disruptions. Municipal crews have initiated precautionary maintenance, inspecting and clearing storm drains and catch basins in flood-susceptible neighborhoods to help mitigate potential overflow.

In response to the incoming storm system, emergency management directives encourage residents to take proactive safety measures. Individuals living in subterranean or basement apartments are urged to prepare contingency plans, including relocating to higher levels or securing alternate shelter before floodwaters begin to gather. Drivers and pedestrians are advised to exercise extreme caution, maintaining safe distances from submerged roads and avoiding any attempt to traverse standing water.

Local authorities also request community assistance in maintaining street drainage by clearing visible leaves, garbage, and debris away from neighborhood catch basins when safe to do so. Property owners are encouraged to report blocked municipal drainage points to city service helplines to prevent severe street pooling.

With lingering showers and isolated severe weather threats forecasted to persist into the overnight hours, regional transportation networks may experience delays. Residents throughout the area are advised to monitor ongoing conditions, prepare for potential power disruptions, and remain indoors during peak thunderstorm activity until the storm system fully dissipates mid-week.

.@NWSNewYorkNY Flood Advisory for Manhattan & The Bronx: Until 2:00 PM on 7/21. 0.5 to 1 in. of rain expected to cause flooding of low-lying & poor drainage areas. https://t.co/sH5GIowN61. Multilingual & ASL Link: https://t.co/UxaBS4Fzwe. #NYwx pic.twitter.com/MXYrTum3rX

— NYCEM – Notify NYC (@NotifyNYC) July 21, 2026

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