A raging four-alarm fire ripped through a warehouse at San Francisco's Pier 45 early Saturday, sending thick, black smoke into the sky that could be seen for miles.
Firefighters responded to the massive blaze at 4:20 a.m. and quickly went into an offensive fight by going inside the warehouse. Officials said the intensity of the fire was so hot, they quickly raised the response to four alarms and evacuated the warehouse. A fireboat was also called to respond to the blaze.
One firefighter suffered a severe laceration to the hand as was taken to the hospital. There have been no updates on the firefighter's condition.
Crews then started to fight the fire with a defensive strategy to protect other structures. Video showing the peak of the blaze shows a raging inferno, ripping through the warehouse. Portions of the warehouse roof also collapsed.
San Francisco Fire Department Lt. Jonathan Baxter said in a press conference that the fire was confined to Pier 45 Building C. The building is a complete loss, SFFD confirmed.
The warehouse destroyed by the blaze is next to the dock for the SS Jeremiah O'Brien, a historic ship used during World War II. Officials said the ship was saved.
San Francisco's popular interactive museum, Muse Mcanique, is located on Pier 45 but did not sustain any damage, according to a tweet.
The Fisherman's Wharf Community Benefit District said in a statement they are "very thankful" no injuries were reported and no lives were lost.
"The response from SFFD and SFPD was extremely quick and we are thankful that due to the rapid emergency response, the surrounding structures including the Jeremiah O'Brien, were all saved."
The cause of the fire remains under investigation, and authorities are asking people to avoid the area as the fire is still actibe.
Officials are working alongside local port authorities to see if there was any structural damage to the pier.
The businesses inside Building C were offices for Blue & Gold Fleet, Red &White Fleet and Jeremiah O'Brien offices and storage. There was also storage for commercial fishing boats.
This is a developing story.