Crews have vacuumed up most of about 37,000 litres of crude oil that sprayed into Los Angeles streets after a high-pressure pipe burst.
A geyser of crude spewed 6 metres high over nearly a kilometre and was knee-high in some parts of the industrial area of Atwater Village before the oil line was remotely shut off, Fire Captain Jaime Moore said.
A handful of commercial businesses were affected, as well as a strip club that was evacuated.
Moore said four people at a medical business were evaluated with respiratory complaints, and two people were transferred to a hospital.
An environmental cleaning company was sopping up the remaining oil and would use high-pressure hoses to wash the streets.
Moore said the pipe burst at a transfer pumping station along a pipeline that runs from Bakersfield to Texas.