United States All categories · all months

Category split

Share of incidents

Top areas

Monthly trend

The number of departments reporting grew over this period, so changes over time partly reflect coverage, not only incident volume.

By day of week

By hour of day

Day × hour

About this app

An interactive explorer of US fire and EMS incidents reported to NERIS, the National Emergency Response Information System. Pick an area, incident type and time filter — or just ask with your voice — and the map and charts update together.

This is an independent app. It is not produced, reviewed or endorsed by the U.S. Fire Administration (USFA), DHS, FEMA, or UL Research Institutes' Fire Safety Research Institute (FSRI).

—Incidents

—Counties

—Block groups

—Months covered

Where the data comes from

Incidents: the public NERIS Incident Basics dataset, published by UL FSRI as the federal contract performer supporting USFA. The fire departments that report to NERIS own their data. Exported from NERIS on 26 September 2026.
Population: U.S. Census Bureau, American Community Survey 2023 5-year estimates (table B01003).
Boundaries: U.S. Census Bureau TIGER/Line 2025 block groups.
Coverage: all 50 states, the District of Columbia and Puerto Rico — but very unevenly (see limitations).

How the numbers are built

Each incident is placed in the Census block group that contains its location. Counties and states are sums of those.
Records with missing or impossible coordinates, or no call time, are left out (about 1.2% of the download).
A small share of incidents (about 0.3%) have valid coordinates but fall outside every block group, mostly on water. They count in state totals but are not drawn on the map.
Day and hour come from the time the call was created, in local clock time.
Rate is incidents per 1,000 residents per month. It divides by the number of months each state has been reporting, so states that joined later are not penalised. Areas under 100 residents get no rate, and rankings only include areas of 5,000 residents or more.
On the map, a cluster's number is the total for everything inside it, so it means the same thing at every zoom level.

Incident categories

The final incident type as assessed on scene. The publisher generalises medical types.

Medical: Medical calls, including injuries from vehicle collisions.
Fire: Grass and vegetation, structure, trash and vehicle fires.
Hazard situation: Gas leaks and odors, downed power lines, smoke investigations, collisions with hazards.
Rescue: Elevator rescues, vehicle extrication, water and other rescues.
Public service: Lift assists, citizen assists, fire and CO alarm checks.
Law enforcement: Calls supporting law enforcement.
No emergency: Cancelled calls, false and malfunctioning alarms, good-intent calls.

Limitations

Reporting is voluntary and still growing. Some states have only a few reporting departments, so a low number can mean low coverage rather than few incidents. Trends over time partly reflect departments joining.
States have been reporting for different lengths of time (8 to 18 months).
A month cannot be combined with a day of week or hour — the summaries do not include that breakdown.
Day and hour stop at county level. The county day × hour grid covers all categories combined.
These are not official statistics. The source data is provided “as is”, and you are responsible for checking it is fit for your use.

Voice search

Your recording (up to 15 seconds) is sent to this app's own server and transcribed with OpenAI Whisper running on Cloudflare Workers AI. The app does not store the audio.
The text is turned into filter settings using only the places, categories and dates that exist in this data. The filters are filled in so you can see exactly what was searched.
If you ask for something that is not in the data, the app says “This data is not available” rather than guessing.

Credits & terms

Data: NERIS · use is subject to the NERIS Terms of Use.