May 2015

SR530 Mudslide and Flooding Event

Snohomish Health District 2

At 10:37AM on 3/22/14, a landslide occurred near Oso, WA. The mile-long slide completely stopped the flow on the North Fork of the Stillaguamish River, covered a section of SR 530, and cut off access to Darrington, WA.

Saturday, March 22, 2014

Snohomish Health District 3

Snohomish Health District 4

Aerial View of the Slide

Snohomish Health District 4

Snohomish Health District 5

Public Health and ESF 8 (Health and Medical)

Response

Snohomish Health District 6

How big is the slide? How many people were in the slide area?How many are hurt? Missing? Potential for fatalities?What hospitals were the injured taken to?What hospital surge and coordination is needed?

Initial Questions

Snohomish Health District 7

• Activated DMCC – 2PM• MRC activation to support Emergency

Operations Call Center• Deactivated DMCC – 8PM• ESF8 - informal activation

Initial Actions – Saturday 3/22

Snohomish Health District 8

• 54 unaccounted for and growing• No communications service north of

the slide– Were individuals missing or unreachable?

• Casualty status:– 7 confirmed dead– 8 reported injured

Sunday 3/23/14

Snohomish Health District 8

Snohomish Health District 9

Missing Persons

Snohomish Health District 10

ASPR equipment – hospital tent

Snohomish Health District 11

Tent set up for use by Medical Examiner’s Office

Snohomish Health District 12

• Public announcement to open 2 FACs• Medical Examiner responsibility• Snohomish Health District assumed

responsibility– PHSKC planning assistance provided

through Public Health Mutual Aid Agreement

• End of day – SHD informed no FAC to open

Family Assistance Center

Snohomish Health District 13

Requests for Environmental Health staff– Food inspections– Septic issues– Hazardous material questions

Public Health

Snohomish Health District 14

•Food donations•Food vendors

Public Health

Snohomish Health District 15

• Flooded houses• Possible mold issues• Proper cleaning

• Damaged septic systems•Chemical and hazard exposures

Public Health

Snohomish Health District 16

Snohomish Health District 17

Photo from Seattle Times

Snohomish Health District 18

Snohomish Health District 19

Snohomish Health District 20

Snohomish Health District 21

• Represented in debris removal task force• Technical assistance for personal

property cleaning

Public Health

Snohomish Health District 22

Caring for Responders