Brown smoke forcing its way out of an underground electrical vault along the border of Old Town and the Pearl District on Tuesday afternoon briefly turned a quiet block into an active response scene for Portland Fire & Rescue. A nearby apartment building reported smoke in its electrical room and lost power while crews tried to figure out what, exactly, was smoldering below street level.
Smoke pushing out of a vault with unknown source of smoke. No visible flames seen.
— Portland Fire & Rescue (@PDXFire) April 21, 2026
What crews reported
Portland Fire & Rescue said firefighters were dispatched for a possible electrical vault fire and arrived to see brown smoke pushing out from a manhole cover, with no visible flames. Crews started tracing the source while coordinating with utility workers to get a handle on what was happening below ground, according to Portland Fire & Rescue.
Why vaults are hazardous
Underground transformer and cable vaults can contain oil-filled equipment and insulated conductors that produce dense, harsh smoke when something fails. The National Electrical Code requires these vaults to meet strict construction and fire-resistance standards for exactly that reason. Shutting off power and ventilating the vault is a standard safety move, since energized gear can create electrocution hazards and the risk of re-ignition, according to NFPA.
Impact on residents and traffic
According to Portland Fire & Rescue, an attached apartment complex reported smoke in its electrical room and went dark while firefighters and utility crews secured the scene and worked on the circuitry. Residents and passersby were told to steer clear of the immediate area so crews could safely sort out the situation and get power restored.
What to watch for
If you notice heavy smoke or a strong burning smell near manholes or utility vaults, the advice is simple, and not optional for anyone who likes keeping eyebrows intact: close your windows and stay away until city crews give the all clear. Call 9-1-1 for emergencies, and look for non-emergency updates and safety information from the city’s fire bureau and official channels, as outlined by Portland Fire & Rescue…