The fire department estimates property damage at $1 million from a propane tank explosion during construction work at a water treatment plant near Mukilteo.
Snohomish County Fire District 1 says the explosion Thursday left a 300-foot blast zone that damaged two buildings, building materials and a truck and trailer.
Five inured people were taken to Harborview Medical Center in Seattle. One was treated and released; three were in satisfactory condition Thursday night, and one critical.
Fire department spokeswoman Leslie Hynes says workers were moving a tank with about 300 gallons of propane inside when a valve broke off. Workers were running away when the propane ignited in the explosion.
Topics Washington
Was this article valuable?
Here are more articles you may enjoy.
Inside the Toxic Legacy of Georgia-Based Mulitbillion-Dollar Carpet Empire 
Trump Demands $1 Billion From Harvard as Prolonged Standoff Appears to Deepen 
BMW Recalls Hundreds of Thousands of Cars Over Fire Risk 
What Analysts Are Saying About the 2026 P/C Insurance Market 
