York County in south-central Pennsylvania is within the 50-mile ingestion zone of Three Mile Island and Peach Bottom Nuclear Stations — creating one of the highest dual-nuclear ingestion zone exposures in the United States. The Susquehanna River creates flooding risk and Ida in 2021 caused flooding across the county. York serves as a regional manufacturing hub. The county has detailed nuclear evacuation plans from the Three Mile Island era.
// 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.
- Emergency Food Supplies
- Water Filtration & Storage
- Backup Generator
- Solar Backup Power
* We may earn a commission from qualifying purchases.
// Risk Intelligence
| Threat Score | 5 / 10 Moderate Risk |
| Primary Hazard | Tornado / Flash Flooding |
| Secondary Hazard | Nuclear Proximity |
| FEMA Flood Zone | Moderate |
| Federally Declared Disasters | 6 |
| Last Major Event | Ida 2021 |
| Event Frequency | Annual |
// Emergency Operations
| Emergency Mgmt Phone | (717) 771-9600 |
| Emergency Shelters | 12 designated facilities |
| Evacuation Routes | I-83 US-30 PA-462 PA-116 |
// County Profile
| County | York County PA |
| State | Pennsylvania (PA) |
| Population | 455 |
| Area | 906 sq miles |
| FEMA Region | Moderate |
// Major Cities
// 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.
Infrastructure risk data is for emergency preparedness awareness. Facility locations are publicly known. Always follow official emergency guidance.