Crews were responding to a fire in a drainage pipe covered with heavy brush in Vista Monday night.
According to Vista Fire officials, the fire began around 7:42 p.m. on the 1200 block of Hacienda Drive.
Vista Fire Department did request the helicopter and Cal Fire hand crews for assistance.
According to Deputy Fire Chief Ned Vander Pol with the Vista Fire Department, they did not have a cause for the fire but the area is often frequented by transients. At this time, it is unknown if that may have been a factor.
Vander Pol said firefighters used chainsaws and other hand tools to cut through the heavy brush. It took crews over an hour to get to the scene of the fire.
He added that the recent rain added to the heavy undergrowth.
The closest structure to the fire is a BMW dealership.
There were no injuries were reported.
No other information was available.