High Risk New York  ·  Nuclear Proximity / Flash Flooding

Westchester County NY

EMERGENCY PREPAREDNESS & DISASTER RISK PROFILE  ·  LAST UPDATED: Mar 2026

7/ 10
Threat Score
Population
1
Area
450
sq miles
Primary Hazard
Nuclear Proximity / Flash Flooding
FEMA Disasters
8
federally declared

Westchester County immediately north of New York City is within the 10-mile Emergency Planning Zone of Indian Point Nuclear Station now decommissioning on the Hudson River. The county has over a million residents making it one of the largest populations within any nuclear plant's EPZ in the United States. The Bronx and Saw Mill Rivers create flooding risk and Hurricane Ida in 2021 caused catastrophic flooding. The county hosts major corporate headquarters and commuter communities for New York City.

// Preparedness Recommendations

  • Evacuation routes inland should be identified in advance.
  • Store at least 72 hours of food and water.
  • Elevate critical belongings above flood level.
  • Have backup power ready in case of grid failure.

// Recommended Supplies

Essential gear for power outages, severe weather, and emergency situations in your area.

// Risk Intelligence

Threat Score 7 / 10    High Risk
Primary Hazard Nuclear Proximity / Flash Flooding
Secondary Hazard Tornado
FEMA Flood Zone High
Federally Declared Disasters 8
Last Major Event Ida 2021
Event Frequency Annual

// Emergency Operations

Emergency Mgmt Phone (914) 995-2100
Emergency Shelters 22 designated facilities
Evacuation Routes I-87 I-95 US-1 NY-9A

// County Profile

County Westchester County NY
State New York (NY)
Population 1
Area 450 sq miles
FEMA Region High

// Major Cities

Greenburgh NY White Plains NY Mount Vernon NY New Rochelle NY Yonkers NY

// Cities in This County

// Other New York Counties

// Nearby Infrastructure Risks

Critical infrastructure facilities within or near this area that could affect civilian safety during emergencies, conflict, or infrastructure failures.

💧
New York City Water Chlorine Storage Kensico NY
Water Treatment  ·  White Plains, NY  ·  NYC Department of Environmental Protection  ·  5-mi risk zone
9/10 Critical
Indian Point Spent Fuel Buchanan NY
Nuclear Power Plant  ·  Buchanan, NY  ·  Holtec International  ·  2-mi risk zone
8/10 High
🏥
Westchester Medical Center NY
Major Hospital  ·  Valhalla, NY  ·  WMC Health  ·  25-mi risk zone
7/10 High
🌉
Tappan Zee Mario Cuomo Bridge NY
Bridge / Critical Crossing  ·  Tarrytown, NY  ·  New York State Thruway Authority  ·  5-mi risk zone
7/10 High
Indian Point Nuclear Plant Buchanan NY
Power Plant  ·  Buchanan, NY  ·  Holtec International  ·  2-mi risk zone
7/10 High

Infrastructure risk data is for emergency preparedness awareness. Facility locations are publicly known. Always follow official emergency guidance.