Moderate Risk Illinois  ·  Tornado / Mississippi River Flooding

Madison County IL

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

6/ 10
Threat Score
Population
265
Area
725
sq miles
Primary Hazard
Tornado / Mississippi River Flooding
FEMA Disasters
9
federally declared

Madison County in southwestern Illinois at the confluence of the Mississippi and Missouri Rivers faces moderate tornado risk and serious river flooding. The great rivers have repeatedly flooded low-lying areas of the county. The county hosts major oil refineries petrochemical and industrial facilities along the rivers creating significant industrial hazmat emergency considerations. The nearby Metro East region is part of the St. Louis metropolitan area.

// 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 / Mississippi River Flooding
Secondary Hazard Industrial Hazmat
FEMA Flood Zone High
Federally Declared Disasters 9
Last Major Event 2019 Mississippi Flooding
Event Frequency Annual

// Emergency Operations

Emergency Mgmt Phone (618) 296-4444
Emergency Shelters 12 designated facilities
Evacuation Routes I-270 IL-143 IL-111 US-67

// County Profile

County Madison County IL
State Illinois (IL)
Population 265
Area 725 sq miles
FEMA Region High

// Other Illinois Counties