Claim: 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).
Evidence: Fidalgo Island is an island in Skagit County, Washington, located about 60 mi (97 km) north of Seattle.