Monroe County Disaster Risk
Monroe County, Florida
FEMA Risk Rating
Relatively Moderate
National Percentile
92th
of 3,144 counties
State Rank
#28
of 67 (1 = highest risk)
Flood Risk
99th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively High
Higher than 99% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Relatively Low
Higher than 62% of US counties
Tornado
Tornado and severe thunderstorm risk
Very Low
Higher than 26% of US counties
Earthquake
Seismic activity and ground shaking risk
Very Low
Higher than 6% of US counties
Hurricane
Tropical cyclone and hurricane risk
Relatively High
Higher than 98% of US counties
Risk Overview
About Natural Disaster Risk in Monroe County, Florida
Monroe's risk remains well above average
Monroe County scores 91.60 on composite disaster risk with a relatively moderate rating, placing it well above the national average despite its smaller size. The score reflects extreme exposure to water-based hazards concentrated in its island geography. While rating as moderate statewide, Monroe's actual vulnerability is significantly higher than most U.S. counties.
Moderate ranking masks extreme exposure
Monroe's 91.60 score exceeds Florida's state average of 75.74 by over 15 points, earning a mid-to-upper ranking statewide. The county's risk profile is narrowly focused on water hazards rather than broadly distributed across multiple threats, which explains its moderate rather than high rating. In flood and hurricane risk specifically, Monroe ranks among Florida's most vulnerable.
Island county faces unique water risks
Monroe County's 91.60 score is comparable to nearby coastal counties but with a distinctly different hazard profile—it has extreme flood risk (98.80) yet minimal tornado risk (25.64) due to its Keys geography. While Miami-Dade and Martin counties share similar hurricane exposure, Monroe's island position creates singular vulnerability to storm surge and sea-level rise. The Keys face hazards others don't.
Flooding and hurricanes are existential
Monroe County faces the state's most extreme flood risk at 98.80 and near-maximum hurricane risk at 98.00, reflecting its low-lying island chain position. Unlike most Florida counties, tornado risk is minimal at 25.64 due to the Keys' maritime climate. For Monroe residents, water represents virtually all disaster risk; wind and storm surge shape the county's hazard landscape.
Flood insurance is absolutely essential
With flood risk at 98.80—the highest in Florida—Monroe County residents must carry flood insurance regardless of flood zone designation; it's simply non-negotiable. Hurricane insurance with surge protection is equally critical given 98.00 risk. Invest in elevation, waterproofing, and backup power systems, as infrastructure disruption following storms is routine.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Monroe County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Monroe County
Risk Verdict
Monroe County registers a moderately elevated natural disaster risk, ranking at the 92th percentile across all U.S. counties. High composite risk signals that multiple hazard types are elevated simultaneously; planning for more than one scenario is important in Monroe County.
Hazard Breakdown
Flood risk is Monroe County's dominant natural hazard, ranked at the 99th percentile nationally under FEMA's National Risk Index. Hurricane ranks second at the 98th percentile nationally. Additional tracked hazards include wildfire (62th percentile), tornado (26th percentile), earthquake (6th percentile).
Preparedness Context
Monroe County's dominant hazard is flooding, ranked at the 99th percentile nationally. In addition to flood insurance, residents should identify their nearest evacuation shelter and store key documents in waterproof containers. Alongside flooding, hurricane exposure at the 98th percentile means households benefit from a multi-hazard preparedness plan rather than focusing on flood alone. Monroe County's county emergency management office publishes hazard-specific guidance tailored to local conditions; bookmarking that resource and the county's alert system is a practical first step for any household.
Regional Context
Monroe County falls 15.9 points above Florida's typical county risk level, which means the hazard environment here is notably more demanding than the state baseline.
Is your household prepared for Monroe County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Monroe County, FL?
What types of natural hazards affect Monroe County?
How does Monroe County risk compare to the Florida average?
Is Monroe County at risk for flooding?
How is natural disaster risk measured?
Why is Monroe County higher risk than average?
Data Source
Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.
Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.