Hamilton County, OH

Name: Hamilton County, Ohio: risk-assessment baseline packet, release 2026-10
Creator: Hazard Plain

Risk-assessment baseline packet. County FIPS 39061. Release 2026-10, data as of 2026-09-30.

Summary

Plan status as of 2026-09-30: Approved, expires 2028-09-20. Plan: Hamilton County (FEMA plan 109296), approved 2023-09-21.

Since the plan was approved on 2023-09-21: no new hazard declaration and 65 NOAA Storm Events records; details under "What changed since your last plan".

Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Inland Flooding ($109,118,464 a year), Tornado ($53,060,938) and Heat Wave ($24,668,202).

The packet's tables are organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B (B1-a to B2-c); the summaries below follow the same order.

Download the packet

Full packet as a web page. File manifest (checksums, source versions).

Plan clock

Approved, expires 2028-09-20

Plan:: Hamilton County (FEMA plan 109296)
Approved:: 2023-09-21
Days to expiry:: 721

What changed since your last plan (approved 2023-09-21)

New federal declarations:: none
Storm Events records since approval:: 65 records (data through 2026-06-30)
Repetitive loss now:: FMA RL 11, SRL 32 (44 CFR 77.2); any definition: 191
Repeat-flood change:: this release sets the baseline count.

Plan status for every jurisdiction listed in this county

51 jurisdictions. Each row is that jurisdiction's own plan clock. Notes include other approved plans FEMA lists for the same jurisdiction.

Jurisdiction	Type	Status	Plan	Approved	Expires	Days to expirynegative = days since expiry	Update underway	Notes
Hamilton County	County	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721
Addyston village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2023-12-12
Amberley village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Arlington Heights village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Blue Ash city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Cheviot city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Cincinnati city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Cleves village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-06-18
Deer Park city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Elmwood Place village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Evendale village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Fairfax village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Fairfield city	City	Approved, expires 2028-11-16	Butler County (FEMA plan 109337)	2023-11-17	2028-11-16	778		this jurisdiction approved 2023-12-12
Forest Park city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Glendale village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Golf Manor village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Greenhills village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Harrison city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Lincoln Heights village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-06-18
Lockland village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Loveland city	City	Approved, expires 2030-11-16	Warren County 2025 Hazard Mitigation Plan (FEMA plan 111229)	2025-11-17	2030-11-16	1,508		Also approved under plan 109296 (Hamilton County, expires 2028-09-20). FEMA's plan status map shows one plan per jurisdiction and may show one of these; this packet uses the approved plan that expires last.
Madeira city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Mariemont village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Milford city	City	No approved plan on record. Approvable pending adoption, not yet eligible	none	none	none		FEMA tracker shows a plan approvable pending adoption	Not yet eligible: adopt the approved plan.
Montgomery city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Mount Healthy city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Newtown village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
North Bend village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
North College Hill city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Norwood city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Reading city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Sharonville city	City	Approved, expires 2028-11-16	Butler County (FEMA plan 109337)	2023-11-17	2028-11-16	778		Also approved under plan 109296 (Hamilton County, expires 2028-09-20). FEMA's plan status map shows one plan per jurisdiction and may show one of these; this packet uses the approved plan that expires last. this jurisdiction approved 2024-06-18
Silverton village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Springdale city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
St. Bernard village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Terrace Park village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
The Village of Indian Hill city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-06-18
Woodlawn village	Village	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Wyoming city	City	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-01-03
Anderson township	Township	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-11-18
Colerain township	Township	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-11-18
Columbia township	Township	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-11-18
Crosby township	Township	Plan 109296 approved 2023-09-21, pending adoption here; not yet eligible	Hamilton County (FEMA plan 109296), pending adoption here	2023-09-21 by FEMA; not yet adopted here	2028-09-20 once adopted		FEMA tracker shows a plan approvable pending adoption	Not yet eligible: adopt the approved plan.
Delhi township	Township	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-11-18
Green township	Township	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-12-11
Harrison township	Township	Plan 109296 approved 2023-09-21, pending adoption here; not yet eligible	Hamilton County (FEMA plan 109296), pending adoption here	2023-09-21 by FEMA; not yet adopted here	2028-09-20 once adopted		FEMA tracker shows a plan approvable pending adoption	Not yet eligible: adopt the approved plan.
Miami township	Township	Plan 109296 approved 2023-09-21, pending adoption here; not yet eligible	Hamilton County (FEMA plan 109296), pending adoption here	2023-09-21 by FEMA; not yet adopted here	2028-09-20 once adopted		FEMA tracker shows a plan approvable pending adoption	Not yet eligible: adopt the approved plan.
Springfield township	Township	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-11-18
Sycamore township	Township	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-11-18
Symmes township	Township	Approved, expires 2028-09-20	Hamilton County (FEMA plan 109296)	2023-09-21	2028-09-20	721		this jurisdiction approved 2024-11-18
Whitewater township	Township	Plan 109296 approved 2023-09-21, pending adoption here; not yet eligible	Hamilton County (FEMA plan 109296), pending adoption here	2023-09-21 by FEMA; not yet adopted here	2028-09-20 once adopted		FEMA tracker shows a plan approvable pending adoption	Not yet eligible: adopt the approved plan.

State plan status and tribal plans in this state: see the state page.

What the packet contains

Sections in FEMA checklist order; each heading names the review item its tables support. Full tables are in the downloads above.

Supports FEMA checklist item B1-a Hazard identification

14 of the 18 National Risk Index hazards apply here.

Not applicable to this county per NRI, with no federal declaration and no Storm Events record since 1996: avalanche, coastal flooding, tsunami and volcanic activity. That is the evidence for leaving them out of the plan.

Highest expected annual loss (NRI, modeled): Inland Flooding, Tornado and Heat Wave.

Not covered by NRI (local data needed): dam failure (incl. upstream dams); levee failure; flash flood as its own subtype; ice jams; debris flows; erosion (riverine and coastal); land subsidence and sinkholes; expansive soils.

The state hazard mitigation plan also lists hazards for this county; FEMA asks the plan to explain any hazard it leaves out.

Supports FEMA checklist item B1-b Hazard location

Cold Wave, Drought, Hail, Heat Wave, Ice Storm, Lightning, Strong Wind and Winter Weather: affects the whole county; national data give no location within it.
Earthquake, Hurricane, Landslide, Tornado and Wildfire vary within the county; the packet lists the highest-rated census tracts for each.
Inland Flooding: the FEMA Flood Insurance Rate Map (FIRM) is the required location source for flooding. See the FEMA Flood Map Service Center (https://msc.fema.gov) for this county.

Supports FEMA checklist item B1-c Hazard extent

Storm Events records for 12 of the 20 NOAA event-type groups mapped to the 18 hazards, with the scale, observed range and worst recorded event for each; the others say which local data are needed.

Worst recorded tornado, hail and thunderstorm wind (the three event types on record since the 1950s; the packet has every group):

Hail: 2.75 in hail, 1997-07-02
Thunderstorm Wind: 87 kt (100 mph) estimated gust, Thunderstorm Wind, 2016-07-13
Tornado: F5 tornado, 1974-04-03, 6.8 mi path length (whole path, pre-1996), 533 yd wide, damage not recorded (pre-1996 record), 3 direct deaths, 190 direct injuries

Supports FEMA checklist item B1-d Previous occurrences

Federal declarations for this area: 18 declarations covering 13 separate hazard incidents counted in this packet; each with type, dates and county Public Assistance dollars.

New since the last plan (approved 2023-09-21): none.

3 statewide declarations listed separately.

Hazards with no Storm Events record and no federal declaration are stated as such (6 of 18).

Storm Events history: 1,140 records (notable ones in the PDF, all of them in the Excel file).

Supports FEMA checklist item B1-e Probability of future events

FEMA annualized frequency (modeled) for each hazard, with a descriptor from a scale defined in the packet.

Highly likely: Hail, Inland Flooding, Lightning, Strong Wind and Winter Weather
Likely: Cold Wave, Heat Wave, Ice Storm, Landslide and Tornado
Possible: Drought
Unlikely: Hurricane

Historical frequency by intensity band (tornado, hail, wind): 9 bands from Storm Events.

Supports FEMA checklist item B1-f Hazards that vary across jurisdictions

Range of census tract risk scores within the area for 14 of the 18 hazards (226 tracts; rated tracts only).

51 jurisdictions: plan clock, repeat-flood count, Public Assistance dollars and event records naming the place (starting figures from federal data).

County Public Assistance in B1-d also includes applicants filed under the county that are not jurisdictions in this plan (for example state agencies, special districts and nonprofits), so the jurisdiction rows add up to less.

Supports FEMA checklist items B2-a and B2-b Vulnerability and potential impacts

The packet's table gives county-level starting figures; the plan describes impacts for each jurisdiction and its own assets.

Storm Events damage since 2023-09-21: $736,250 in county-coded records (50 records); $0 reported for the zone (15 zone records). Data through 2026-06-30; nominal dollars.

Local data needed

To gather:

Critical facilities and lifelines per hazard
A problem statement per jurisdiction per hazard
Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a)
Future assets

Supports FEMA checklist item B2-a Vulnerability (county context)

Population 830,623; building value $172,749,024,592 and agriculture value $29,659,724 (total, not at risk).

National Risk Index rating Relatively High; social vulnerability Relatively Moderate; community resilience Very High.

Supports FEMA checklist item B2-c Repetitive loss properties

Repetitive-loss properties, FMA definition (44 CFR 77.2): 11 repetitive loss, 32 severe repetitive loss. NFIP insurance definition: 188 and 28.

Mitigated 0; insured 61; NFIP data as of 2026-08-02. Counts by occupancy group and for each jurisdiction are in the packet.

Releases

2026-10 (this release)

Each release is dated; this is release 2026-10. It was first published 2026-09-30; its files do not change. Later releases will be listed here with what changed between them. All releases.

Cite this

Hazard Plain (2026). Hamilton County, OH: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 39061). Automated baseline. https://hazardplain.org/oh/39061/ Built from FEMA OpenFEMA, the FEMA National Risk Index and NOAA NCEI Storm Events; source versions in the packet's Sources list.

Source citations for the plan's bibliography (8)

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-29T134039Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)
FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-29T162832Z, pulled 2026-09-30, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)
FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-29T150754Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)
FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)
FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-30, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_Counties.zip (download, 25 MB), https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_CensusTracts.zip (download, 635 MB)
NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-30, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-30, https://www.weather.gov/gis/ZoneCounty
U.S. Census Bureau, Census 2024 Gazetteer, 2020 place by county, CT county-to-cousub crosswalk, version 2024-gazetteer, pulled 2026-09-30, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_counties_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_cousubs_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_place_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_unsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_elsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_scsd_national.zip, https://www2.census.gov/geo/docs/reference/codes2020/national_place_by_county2020.txt, https://www2.census.gov/geo/docs/reference/ct_change/ct_cou_to_cousub_crosswalk.xlsx (used to match place names and codes; no table prints its values)

How this packet is built: methods and sources