Natural Disasters in Grenville, SD

Hazard risk, disaster history, and FEMA data

Natural Hazard Risk

Source: FEMA National Risk Index

Risk Score

27.6

Very Low

Expected Annual Loss

23.0

Score (0-100)

Social Vulnerability

74.7

Score (0-100)

Community Resilience

84.5

Score (0-100)

Top Hazard Risks

Winter Weather85.1Strong Wind82.1Wildfire77.9

Hazard	Risk Score
Winter Weather	85.1
Strong Wind	82.1
Wildfire	77.9
Ice Storm	76.1
Cold Wave	76.0
Hail	69.0
Landslide	42.1
Tornado	40.6
Heat Wave	23.2
Earthquake	14.7
Drought	13.6
Lightning	3.1

Scores range from 0 (lowest risk) to 100 (highest risk) relative to all U.S. communities. Data from FEMA National Risk Index.

Disaster Declarations

Source: FEMA OpenFEMA

Total Declarations

Most Recent

Flood

Jul 2023

Most Common Type

Severe Storm

10 declarations

Date	Type	Declaration
Jul 6, 2023	Flood	FLOODING
Feb 27, 2023	Winter Storm	SEVERE WINTER STORMS AND SNOWSTORM
Jun 29, 2022	Severe Storm	SEVERE STORM, STRAIGHT-LINE WINDS, TORNADOES, AND FLOODING
Apr 5, 2020	Biological	COVID-19 PANDEMIC
Mar 13, 2020	Biological	COVID-19
Nov 18, 2019	Severe Storm	SEVERE STORMS, TORNADOES, AND FLOODING
Jun 7, 2019	Flood	SEVERE WINTER STORM, SNOWSTORM, AND FLOODING
Feb 1, 2017	Severe Storm	SEVERE WINTER STORM
May 13, 2011	Flood	FLOODING
May 13, 2010	Flood	FLOODING
Mar 10, 2010	Severe Storm	SEVERE WINTER STORM
Jun 16, 2009	Severe Storm	SEVERE STORMS AND FLOODING
May 22, 2007	Severe Storm	SEVERE STORMS, TORNADOES, AND FLOODING
Dec 20, 2005	Severe Storm	SEVERE WINTER STORM
Sep 10, 2005	Coastal Storm	HURRICANE KATRINA EVACUATION
May 17, 2001	Flood	SEVERE WINTER STORMS, FLOODING, AND ICE JAMS
Jun 1, 1998	Flood	FLOODING, SEVERE STORMS, TORNADOES
Apr 7, 1997	Flood	SEVERE FLOODING, SEVER WINTER STORMS,HEAVY RAINS HIGH WINDS
Jan 10, 1997	Severe Storm	SEVERE WINTER STORMS AND BLIZZARD CONDITIONS
May 26, 1995	Flood	FLOODING

Showing 20 of 24 declarations

Flood Insurance (NFIP)

Source: FEMA NFIP

Total Claims

256

Total Claims Paid

$4,140,660

Avg Claim Payout

$16,174

County-level NFIP data from FEMA National Flood Insurance Program.

Disaster Recovery Spending

Source: FEMA Public Assistance

Total Federal Spending

$4,764,387

Disasters with PA

Total Projects

350

Disaster	Type	Projects	Federal $
DR-1984	Flood	67	$1,623,758
DR-1915	Flood	83	$613,088
DR-1620	Severe Storm(s)	19	$395,704
DR-1887	Severe Storm(s)	3	$393,117
DR-1844	Severe Storm(s)	48	$376,005
DR-1375	Flood	49	$361,734
DR-4656	Severe Storm(s)	2	$259,540
DR-4440	Other	20	$245,287
DR-1702	Severe Storm(s)	48	$241,975
DR-4718	Flood	8	$199,686
DR-4689	Winter Storm	1	$39,452
DR-4469	Severe Storm(s)	2	$15,042

Hazard Mitigation

Source: FEMA Hazard Mitigation Assistance

Mitigation Projects

Federal Funding

$9,121,532

Properties Protected

Avg Benefit-Cost Ratio

1.03

BCR

Top Mitigation Project Types

Project Type	Projects	Federal $
400.1: Utility Protective Measures (Electric, Gas, etc.)	9	$143,834
200.1: Acquisition of Private Real Property (Structures and Land) - Riverine	7	$4,610,656
201.1: Relocation of Private Structures - Riverine	4	$260,011
91.1: Local Multihazard Mitigation Plan	2	$20,250
600.1: Warning Systems (as a Component of a Planned, Adopted, and Exercised Risk Reduction Plan)	2	$17,266

Federally funded projects to reduce future disaster risk. Only includes completed or obligated projects.

Grenville has a very low overall natural hazard risk rating according to FEMA's National Risk Index. The top hazard risks are winter weather, strong wind, wildfire. The area has had 24 federal disaster declarations. The most common disaster type is severe storm (10 declarations). 256 flood insurance claims have been filed in the area. FEMA has obligated $4,764,387 in public assistance recovery funding. 32 hazard mitigation projects have been funded to reduce future risk.