The Hudson Valley Could See Dangerous Flash Flooding This Week. Here’s What You Need to Know.
- Hudson Valley Happenings
- 1 day ago
- 3 min read
Heavy thunderstorms could bring localized flooding across several Hudson Valley counties. Here’s where conditions may become dangerous and how to stay safe.
By Larie Pidgeon / Hudson Valley Happenings
Last updated: Tuesday, July 28, 2026
Heavy rain and thunderstorms are moving through the Hudson Valley, bringing the possibility of flash flooding, rapidly rising streams and dangerous road conditions across the region.
The National Weather Service has issued Flood Watches for Dutchess, Ulster, Greene, Columbia, Orange, Putnam, Rockland, Westchester and Sullivan counties. A Flood Watch does not mean every community will flood. It means conditions are favorable for flooding, and residents should be prepared to act quickly if a Flash Flood Warning is issued.
LIVE UPDATES
Flood Watches remain in effect across the region. This section will be updated as verified warnings, road closures, outages and county announcements become available.
WHEN WILL CONDITIONS BE WORST?
The greatest concern continues through Wednesday. Forecasters expect rounds of rain and thunderstorms rather than one uninterrupted wall of rain. Storms may repeatedly pass over the same community, allowing rainfall to accumulate faster than storm drains, creeks and streams can handle it.
The heaviest rain will not fall evenly. One town may receive manageable rain while a neighboring community experiences serious flooding.
WHY FLASH FLOODING IS THE MAIN CONCERN
Flash flooding can develop within minutes of intense rainfall. Excessive runoff may flood low-lying roads, underpasses, poor-drainage intersections, small creeks and streams, urban neighborhoods, campgrounds, trails near waterways and below-grade spaces.
COUNTY-BY-COUNTY: WHERE PROBLEMS MAY DEVELOP
Dutchess County: Watch low-lying roads, poor-drainage areas and communities near smaller creeks and streams. Conditions may change rapidly beneath slow-moving thunderstorms.
Ulster County: Mountain runoff and rising waterways can become dangerous quickly, particularly around the Catskills and communities near streams. Avoid hiking trails, swimming holes and creekside recreation areas during heavy rain.
Greene County: Steep terrain can send water downhill quickly. People near mountain roads, creeks, campgrounds and low-water crossings should remain alert.
Columbia County: Poor-drainage locations, low-lying roads and areas near small waterways may experience flooding where the heaviest storms develop.
Orange County: Drivers should prepare for rapidly changing road conditions. Low-lying roads, underpasses and areas near streams may become impassable during intense downpours.
Putnam County: Small streams and poor-drainage roads can rise or flood quickly. Monitor local alerts rather than relying on conditions several towns away.
Rockland County: Urban drainage areas, underpasses and roads near waterways deserve extra caution, especially in locations that flooded during earlier storms.
Westchester County: Flood-prone roads, parkways, underpasses and communities near small waterways may become hazardous during periods of intense rainfall. Never assume a familiar route will remain open.
Sullivan County: Parts of the Catskills may receive locally higher rainfall totals. Watch mountain roads, steep drainage areas, creeks, campgrounds and low-lying crossings.
SHOULD YOU CANCEL OUTDOOR PLANS?
Anyone planning to hike, camp, swim or spend time beside a river or creek should reconsider those plans while heavy rain and thunderstorms are occurring. A swimming hole may appear calm before water from rainfall farther upstream arrives.
WHAT DRIVERS SHOULD DO
Check current alerts and road conditions before leaving.
Avoid known low-lying routes and underpasses.
Never drive around a barricade or through floodwater.
Turn around rather than trying to judge how deep the water is.
IF A FLASH FLOOD WARNING IS ISSUED
Move to higher ground immediately when instructed.
Do not walk, swim or drive through floodwater.
Keep children and pets away from creeks and drainage channels.
Keep emergency alerts enabled and follow instructions from local officials.
COULD THE POWER GO OUT?
Thunderstorms can produce gusty winds in addition to heavy rainfall. Charge phones and portable batteries before conditions worsen. Never operate a generator inside a house, garage or enclosed space.
THE BOTTOM LINE
Not every Hudson Valley community will experience flooding, but all nine counties are under a Flood Watch. The greatest danger will occur where slow-moving storms repeatedly cross the same location. Monitor alerts, avoid waterways and never attempt to cross a flooded road.
OFFICIAL RESOURCES
National Weather Service Albany, New York and Binghamton offices
County emergency-management alerts and local police announcements
Local utility outage maps
Hudson Valley Happenings will continue updating this article as verified information becomes available.
