Middletown is the closest borough to Three Mile Island Nuclear Generating Station — site of the worst nuclear accident in US history. The 1979 partial meltdown of TMI Unit 2 caused a partial core meltdown and radioactive gas release, triggering the evacuation of pregnant women and children within 5 miles. Unit 1 operated until 2019 and the plant's decommissioning is ongoing. The community sits within the primary Emergency Planning Zone of an active nuclear cleanup site and the Susquehanna River creates additional flooding hazard.
// 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
- Potassium Iodide (KI) Tablets
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// Risk Intelligence
| Threat Score | 8 / 10 High |
| Primary Hazard | Nuclear EPZ / Flooding |
| FEMA Flood Zone | Low |
| County FEMA Declarations | 6 |
| Last Major Event | Ida 2021 |
// Emergency Information
| Emergency Phone | 717-948-3000 |
| Evacuation Routes | State and US highways |
| Elevation | 322 ft above sea level |
// County Risk Profile
// Other Cities in Dauphin County PA
// 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.