The fire erupted around 4:30 p.m., city spokesman Robert Corrales said. Less than two hours later, fire officials struck a 12th alarm. Dark smoke could be seen for miles as flames spread to neighboring vacant homes.
"It was like a firestorm," Camden Fire Chief Michael Harper said.
Eleven displaced families were being aided by the Red Cross, Harper said.
Several other families made their own arrangements for the night.
The cause of the blaze was under investigation.
Reliable Tire Distributors moved to Gloucester Township around 1999. A member of the Betz family, which had owned the company, declined to comment on the fire and referred a reporter to a lawyer who could not be reached.
The abandoned buildings had become a nuisance, attracting thieves and vandals, said Richard Gaines, who lives above the three small businesses he owns on Haddon Avenue and Mount Vernon Street.
"They took out pipes and copper, anything they could find," he said.
The blistering afternoon heat and wind caused the fire to spread quickly, said Al Ashley, president of the union that represents superior officers in the Camden Fire Department.
"I've been here 24 years and . . . I've never seen anything like that," he said.
Firefighters also struggled because they did not have enough engine companies to provide water, Ashley said.
"A lot of hydrants are on the same grid, so now we're [also] dealing with water pressure," he said, holding a walkie-talkie on Sycamore Street, where firefighters were pulling boards from closed-up vacant homes in case the fire spread further.
Hector Lopez, 28, was sitting on his couch watching television when he smelled smoke and called 911. He said he and his family left the house and saw smoke coming from the vacant Board of Education building next door.
Flames started to shoot from the old tire building two doors down, and "then it went everywhere," Lopez said.
Contact staff writer Claudia Vargas at 856-779-3917 or email@example.com.