Plan Smarter: National Risk Index Layer Now on Radius+

The Radius+ team is excited to announce our newest map layer - the National Hazard Risk index!

Overview:

The National Risk Index is a dataset that illustrates the communities at risk for 18 natural hazards. The data is published annually by FEMA.

These natural hazards include:

• Avalanche
• Coastal flooding
• Cold wave
• Drought
• Earthquake
• Hail
• Heatwave
• Hurricane
• Ice storm
• Landslide
• Lightning
• Riverine flooding
• Strong wind
• Tornado
• Volcanic Activity
• Wildfire
• Winter Weather
• Composite (all hazards)

For each hazard, the dataset provides:

• Risk Score
• Expected Annual Loss Rate (Buildings)
• Frequency

The map is color-coded by Risk Score, which reflects how likely a hazard is to occur in a given area:

1 = Very Low

2 = Low

3 = Moderate

4 = High

5 = Very High

Data Definitions:

Expected Annual Loss Rate: Expected Annual Loss Rate is a measure of relative natural hazard intensities independent of the community's exposure value. They represent the average percentage losses to buildings, population, and/or agriculture (consequence types) each year due to natural hazards.

Frequency: The expected frequency or probability of a hazard occurrence per year.

Risk Score: This score reflects a community’s overall risk of negative impacts from natural hazards. It’s rated on a scale from 1 to 5, with 1 indicating very low risk and 5 indicating very high risk.