San Francisco firefighters responded to a one-alarm fire early Tuesday that appears to have broken out, improbably, underneath and at the edge of Pier 28 in the rain.Firefighters reponded at 4:05 am to a report of a blaze on Pier 28 — the SFFD reported the fire as being on Pier 30, though videos from the scene appeared to show them extinguishing it on Pier 28, next door.All lanes of the Embarcadero were temporarily closed in both directions as hose lines were running across the roadway. 1 alarm working fire at 525 The Embarcadero South Pier 30. Firefighters are on scene extinguishing fire on the edge of the pier. Nobody injured. Both lanes of the Embarcadero are closed in both directions due to fire hose across all lanes. #SFFD UPDATE: Fire is contained and… pic.twitter.com/5T9OtbQdPT— SAN FRANCISCO FIRE DEPARTMENT MEDIA (@SFFDPIO) December 24, 2024 The fire appeared to be underneath the wooden structure of the pier, at its far edge in the Bay, and there's been no explanation for its cause — which seems fairly improbable during a rainstorm?The fire was extinguished and there were no injuries.All lanes of Embarcadero are back open.