Moderate Risk Pennsylvania  ·  Tornado / Flash Flooding

Montgomery County PA

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

6/ 10
Threat Score
Population
856
Area
487
sq miles
Primary Hazard
Tornado / Flash Flooding
FEMA Disasters
6
federally declared

Montgomery County northwest of Philadelphia is one of the wealthiest counties in Pennsylvania and hosts major pharmaceutical companies including GlaxoSmithKline and Merck headquarters. Limerick Nuclear Station is located in the county creating the 10-mile EPZ for the plant. The Schuylkill River creates flooding risk through the county. The 2021 remnants of Hurricane Ida caused catastrophic flooding killing multiple residents and demonstrating the county's vulnerability to extreme rainfall events.

// 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 6 / 10    Moderate Risk
Primary Hazard Tornado / Flash Flooding
Secondary Hazard Nuclear Ingestion Zone
FEMA Flood Zone Moderate
Federally Declared Disasters 6
Last Major Event 2021 Flooding
Event Frequency Annual

// Emergency Operations

Emergency Mgmt Phone (610) 278-3000
Emergency Shelters 20 designated facilities
Evacuation Routes I-76 I-276 US-202 PA-309

// County Profile

County Montgomery County PA
State Pennsylvania (PA)
Population 856
Area 487 sq miles
FEMA Region Moderate

// Major Cities

Pottstown PA Lower Merion PA Abington PA Norristown PA

// Cities in This County

// Other Pennsylvania Counties

// Nearby Infrastructure Risks

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

Limerick Nuclear Plant PA
Nuclear Power Plant  ·  Pottstown, PA  ·  Constellation Energy  ·  10-mi risk zone
8/10 High
💧
Philadelphia Water Department PA
Water Treatment  ·  Philadelphia, PA  ·  Philadelphia Water Department  ·  10-mi risk zone
7/10 High

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