SkyGround

County-level natural hazard risk data for researchers

All counties

Summit County, OH

Population: 540,333 · FIPS code: 39153

Relatively Moderate Overall risk index: 91.2 / 100 (percentile among US counties)

Hazard breakdown

Hazard NRI rating NRI score NOAA events
(2016–2025)
Wildfire Very Low 53.2 0
Inland Flooding Relatively High 94 21
Coastal Flooding Not Applicable — 0
Earthquake Relatively Low 78.3 —
Heat Wave Relatively Moderate 90.3 0
Tornado Relatively High 91.1 5

NOAA event counts are recorded county-level storm events from the NOAA Storm Events Database for 2016–2025. NOAA does not track earthquakes, and some hazard reports are filed by NWS forecast zone rather than county, so these counts are a partial, not exhaustive, record of recent activity. See the methodology page for details.

Federal disaster declaration history

Summit County has been included in 14 federal disaster declarations between 1969 and 2020, most recently for Biological in 2020 (COVID-19 ).

Source: FEMA OpenFEMA Disaster Declarations Summaries. Counts reflect county-level declaration records (a single disaster can produce more than one record per county), not modeled risk.

Geomagnetic latitude

Summit County sits at approximately 50.3°N geomagnetic latitude. Aurora can become visible on the horizon here during geomagnetic storms reaching roughly Kp 8 or higher (G4 – Severe on NOAA's scale). See current space weather conditions for live geomagnetic activity and aurora forecasts.

Geomagnetic latitude is an approximate dipole-model calculation based on this county's geographic centroid (US Census Bureau). See the methodology page for details and limitations.

What these ratings mean

Each score reflects how Summit County's expected losses from that hazard compare to every other county in the country, based on FEMA's National Risk Index. A "Very High" rating means this county is among the most exposed in the US for that hazard relative to other counties — it does not mean a disaster is likely this year. See the methodology page for how these scores are calculated.