Low Risk Indiana  ·  Tornado / Flash Flooding

Hamilton County IN

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

4/ 10
Threat Score
Population
371
Area
398
sq miles
Primary Hazard
Tornado / Flash Flooding
FEMA Disasters
4
federally declared

Hamilton County north of Indianapolis has been the fastest growing county in Indiana for two decades and one of the fastest growing in the Midwest. The White River and its tributaries create flooding risk. The county sits in a moderate tornado corridor. Carmel and Fishers have transformed from small towns to major suburban cities with significant corporate campus development. Hamilton County serves as the primary affluent northern suburban ring of the Indianapolis metro.

// 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 4 / 10    Low Risk
Primary Hazard Tornado / Flash Flooding
Secondary Hazard Severe Storm
FEMA Flood Zone Low
Federally Declared Disasters 4
Last Major Event 2019 Tornado
Event Frequency Annual

// Emergency Operations

Emergency Mgmt Phone (317) 776-9600
Emergency Shelters 12 designated facilities
Evacuation Routes I-69 US-31 US-421 IN-37

// County Profile

County Hamilton County IN
State Indiana (IN)
Population 371
Area 398 sq miles
FEMA Region Low

// Major Cities

Noblesville IN Carmel IN Fishers IN

// Cities in This County

// Other Indiana Counties

// Nearby Infrastructure Risks

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

Midcontinent ISO MISO Control Center Carmel IN
Power Plant  ·  Carmel, IN  ·  Midcontinent Independent System Operator  ·  5-mi risk zone
8/10 High

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