Union County OH in Ohio faces tornado / flash flooding risk across its 437 square mile area. Marysville serves this northwest Columbus suburb county with Mad River flooding. Union serves as the county seat and regional emergency coordination hub.
// 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
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// Risk Intelligence
| Threat Score | 5 / 10 Low Risk |
| Primary Hazard | Tornado / Flash Flooding |
| Secondary Hazard | Severe Storm |
| FEMA Flood Zone | Low |
| Federally Declared Disasters | 6 |
| Last Major Event | 2019 Tornado |
| Event Frequency | Annual |
// Emergency Operations
| Emergency Mgmt Phone | (937) 645-3006 |
| Emergency Shelters | 2 designated facilities |
| Evacuation Routes | State and US highways |
// County Profile
| County | Union County OH |
| State | Ohio (OH) |
| Population | 57 |
| Area | 437 sq miles |
| FEMA Region | Low |
// Other Ohio Counties
Lake County OH
Tornado / Lake Erie Storm
6/10
Moderate
Montgomery County OH
Tornado / Severe Storm
6/10
Moderate
Fairfield County OH
Tornado / Lake Erie Storm
5/10
Low
Ottawa County OH
Tornado / Lake Erie Storm
5/10
Low
Highland County OH
Tornado / Flash Flooding
5/10
Low
Scioto County OH
Tornado / Flash Flooding
5/10
Low