Arroyo Municipio
Puerto Rico — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 0th
Arroyo Municipio faces very low composite natural disaster risk (NRI Risk Index score 0.0, 0th national percentile), driven primarily by a mix of natural hazards exposure. Expected annual loss across all 18 hazard types is $12M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.25 / yr | $11K |
| Cold Wave | Very Low | 0.00 / yr | $0 |
| Drought | Very Low | 8.31 / yr | $0 |
| Earthquake | Very Low | 0.03 / yr | $3M |
| Hail | Very Low | 0.03 / yr | $249 |
| Heat Wave | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.21 / yr | $7M |
| Ice Storm | Very Low | 0.00 / yr | $0 |
| Riverine Flood | Very Low | 0.29 / yr | $809K |
| Landslide | Very Low | 0.85 / yr | $381K |
| Lightning | Very Low | 62.47 / yr | $292K |
| Strong Wind | Very Low | 0.00 / yr | $89 |
| Tornado | Very Low | 0.00 / yr | $7K |
| Tsunami | Very Low | 0.06 / yr | $824K |
| Volcanic Activity | Very Low | 0.01 / yr | $0 |
| Wildfire | Very Low | 0.00 / yr | $0 |
| Winter Weather | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Arroyo Municipio?
Arroyo Municipio has a composite FEMA National Risk Index score of 0.0 out of 100, placing it in the Very Low category and the 0th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Arroyo Municipio?
The three highest-rated hazards are Avalanche (Very Low, $0 EAL), Coastal Flood (Very Low, $11K EAL), Cold Wave (Very Low, $0 EAL). These account for most of the county's expected annual losses.
How does Arroyo Municipio compare to other Puerto Rico counties?
Arroyo Municipio ranks #8 of 78 Puerto Rico counties for overall natural disaster risk, with a very low rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Arroyo Municipio's $12M EAL is a statistical average, not a guarantee for any specific year or address.