An RV fire and crash closed all eastbound lanes of the Mount Baker Tunnel on I-90 in Seattle.

An RV fire closed all eastbound lanes of Interstate 90 in Seattle's Mount Baker Tunnel on May 12, 2025, after a crash involving another car. The fire was extinguished by 12:50 p.m., but the lanes remained closed for cleanup and inspection. There were no reported injuries, yet drivers faced significant delays and were advised to use alternate routes. A flammable cargo restriction was in place for both directions of the tunnel.