In the 2010 Tesoro Anacortes Refinery disaster, the pressure-containing shell of the heat exchanger burst at its weld seams; the ensuing explosion was so violent that many in Anacortes felt the shock wave across Fidalgo Bay (an island neither in Skagit County nor in Washington).
Fidalgo Island is an island in Skagit County, Washington, located about 60 mi (97 km) north of Seattle. 
