Moderate Risk South Carolina  ·  Hurricane / Tornado

Dorchester County SC

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

6/ 10
Threat Score
Population
162
Area
575
sq miles
Primary Hazard
Hurricane / Tornado
FEMA Disasters
7
federally declared

Dorchester County northwest of Charleston has been one of the fastest growing counties in South Carolina as Charleston's suburbs expand. The county faces serious hurricane risk and hosts Joint Base Charleston — a combined Air Force and Navy installation critical to air mobility and submarine operations for the southeastern US. The Edisto and Ashley Rivers create flooding risk. Hurricane Dorian in 2019 impacted the county and the ongoing growth expands the population exposed to hurricane risk.

// 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 Hurricane / Tornado
Secondary Hazard Flash Flooding
FEMA Flood Zone High
Federally Declared Disasters 7
Last Major Event Dorian 2019
Event Frequency Annual

// Emergency Operations

Emergency Mgmt Phone (843) 832-0050
Emergency Shelters 8 designated facilities
Evacuation Routes I-26 US-78 SC-61 SC-642

// County Profile

County Dorchester County SC
State South Carolina (SC)
Population 162
Area 575 sq miles
FEMA Region High

// Major Cities

Summerville SC

// Cities in This County

// Other South Carolina Counties