Natural Disasters in Marietta-Alderwood, WA

Hazard risk, disaster history, and FEMA data

Natural Hazard Risk

Source: FEMA National Risk Index

Risk Score

91.0

Relatively Moderate

Expected Annual Loss

91.6

Score (0-100)

Social Vulnerability

21.5

Score (0-100)

Community Resilience

78.7

Score (0-100)

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

Disaster History & Federal Spending

Source: FEMA

Total Declarations

Public Assistance

$42.8M

Individual Assistance

$2.8M

Most Common Type

Flood

12 declarations

Disaster	Type	Date	PA $	IA $
Severe Storms, Straight-line Winds, Flooding, Landslides, and Mudslides →	Flood	Dec 2025	—	—
Severe Storms, Straight-line Winds, Flooding, Landslides, and Mudslides →	Flood	Jan 2022	$24.0M	$1.7M
Severe Storms, Flooding, Landslides, and Mudslides →	Flood	Apr 2020	$7.5M	—
Covid-19 Pandemic →	Biological	Mar 2020	$3.3M	$560K
Covid-19 →	Biological	Mar 2020	—	—
Severe Winter Storms, Straight-line Winds, Flooding, Landslides, Mudslides, Tornado →	Severe Storm	Mar 2019	$3.1M	—
Severe Winter Storms, Flooding, Landslides, Mudslides →	Flood	Apr 2017	$1.9M	—
Wildfires and Mudslides →	Fire	Oct 2015	—	—
Severe Windstorm →	Severe Storm	Oct 2015	$329K	—
Goodell Fire →	Fire	Aug 2015	—	—
Severe Winter Storm and Record and Near Record Snow →	Severe Storm	Mar 2009	$266K	—
Severe Winter Storm, Landslides, Mudslides, and Flooding →	Flood	Jan 2009	$1.9M	$522K
Severe Winter Storm, Landslides, and Mudslides →	Severe Storm(s)	Feb 2007	$6K	—
Hurricane Katrina Evacuation →	Coastal Storm	Sep 2005	—	—
Severe Storms and Flooding →	Severe Storm	Nov 2003	$399K	$60K
Earthquake →	Earthquake	Mar 2001	$175K	—
Severe Winter Storms, Land & Muds Slides,flooding →	Severe Storm	Jan 1997	—	—
Severe Storms, High Wind, and Flooding →	Severe Storm	Jan 1996	—	—
The El Nino (the Salmon Industry) →	Fishing Losses	Aug 1994	—	—
Severe Storms & High Tides →	Flood	Mar 1991	—	—

Showing 20 of 28 disasters

PA = FEMA Public Assistance (infrastructure recovery). IA = Individual Assistance (homeowner/renter aid).

Flood Insurance (NFIP)

Source: FEMA NFIP

Total Claims

1,196

Total Claims Paid

$47,663,909

Avg Claim Payout

$39,853

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

Hazard Mitigation

Source: FEMA Hazard Mitigation Assistance

Mitigation Projects

Federal Funding

$5,712,313

Properties Protected

Avg Benefit-Cost Ratio

3.22

BCR

Top Mitigation Project Types

Project Type	Projects	Federal $
200.1: Acquisition of Private Real Property (Structures and Land) - Riverine	5	$1,514,701
91.1: Local Multihazard Mitigation Plan	2	$5,452
200.6: Acquisition of Private Real Property (Structures and Land) - Landslide	1	$311,066
200.1: Acquisition of Private Real Property (Structures and Land) - Riverine; 200.2: Acquisition of Private Real Property (Structures and Land) - Coastal	1	$456,171
403.2: Stormwater Management - Diversions	1	$0

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

Marietta-Alderwood has a relatively moderate overall natural hazard risk rating according to FEMA's National Risk Index. The top hazard risks are avalanche, earthquake, landslide. The area has had 26 federal disaster declarations. The most common disaster type is flood (12 declarations). 1,196 flood insurance claims have been filed in the area. FEMA has obligated $42,793,186 in public assistance recovery funding. $2,826,950 has been distributed in individual assistance to disaster-affected residents. 23 hazard mitigation projects have been funded to reduce future risk.