The disaster began as Olympic Pipeline was transporting gasoline from
Cherry Point Refinery to terminals in Seattle and Portland, Oregon. A pressure relief valve that was improperly configured failed to open in the pipeline, which resulted in a surge of pressure after an automatic valve shut for unknown reasons. This resulted in the line rupturing at 3:25 that afternoon, and gasoline began spilling into Hannah Creek just above its confluence with
Whatcom Creek. As the gasoline continued to spill, many people in the area called 9-1-1 to report the gasoline smell, and an Olympic Pipeline employee who was in the area called the company to inquire whether they had an anomaly. When the Bellingham Fire Department arrived, massive amounts of gasoline had turned the creek pink, and the fumes were overwhelming. The fire department notified Olympic Pipeline of the leak and evacuated the area around the creek. The black smoke plume extended to an altitude of and the smoke from the explosion was visible from
Vancouver to
Anacortes. The fire exceeded . Local businesses were evacuated,
Interstate 5 was closed to traffic, and the Coast Guard stopped maritime traffic in
Bellingham Bay in anticipation of the fire travelling the entire length of the creek. However, the fire never extended past Interstate 5. Emergency responders stopped most of the fires by 6:30 p.m.; the smoke dissipated by 7:00. ==Victims==