Natural Disaster Risk in Greenwich

Natural Hazard Profile: Greenwich, Connecticut

Located along the northeastern Atlantic Seaboard in Western Connecticut County, Greenwich is a city of approximately 24,880 residents. The humid continental climate that characterizes this part of Connecticut — marked by cold winters, warm summers, and four well-defined seasons — directly influences the types and severity of natural hazards present, making Greenwich a community where hazard awareness has real practical value.

Greenwich's overall natural disaster risk is rated 7.8/10 (High) by FEMA's National Risk Index. Coastal flood risk defines the local natural hazard environment, with sea-level rise trends gradually increasing the frequency of tidal flooding events alongside storm surge threats. Secondary hazards include hurricane and wind.

Relative to other U.S. communities, Greenwich's natural disaster risk is well above the U.S. national average of 4.5/10, slightly above the 6.8/10 state average. The hazard distribution here is led by coastal flood and hurricane, as measured by FEMA across Western Connecticut County. While city-specific sub-county variation exists, these scores represent the best available federal risk estimate.

With a high natural disaster risk rating, Greenwich residents benefit from taking preparedness seriously. Reviewing insurance coverage for coastal flood and secondary hazards, registering for emergency alerts, and maintaining a household emergency kit are practical steps that can significantly reduce impact during a major event.