The Bellingham Herald said the medical examiner reports the 34-year-old man died Tuesday.
Police believe the man climbed over a chain-link fence Sunday and walked toward an oncoming northbound train. Officers say the man waved and smiled at the conductor before leaning his head forward into the train's path.
The medical examiner said the man had a long history of mental illness. His death was ruled a suicide.
Train passengers were bused to Vancouver, British Columbia.
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