San Jose fire department warned people to not touch the foam, as it can cause skin irritation.
Firefighters are on the scene.
The foam has flooded the hangar at San Jose airport and is blowing into surrounding surface streets. Fire officials say foam was released after a fire alarm malfunctioned at the hangar, which deals with jet planes.
The hangar is owned by Signature Flight Support and accommodates large cabin sized aircraft. They provide support services like aviation fueling.
Our photojournalist Scott Arthur captures the growing mountain of foam at @FlySJC as @SanJosePD sets up a roadblock. pic.twitter.com/1XmpQnnY6Y
— Jonathan Bloom (@BloomTV) November 18, 2016
Sky 7 just shot this photo of a tanker truck bathing in the firefighting foam emanating from the back vents of the new @FlySJC hangar. pic.twitter.com/SGWkccvbkg
— Jonathan Bloom (@BloomTV) November 18, 2016
Firefighting foam released from back of @FlySJC hangar is blowing around in the wind. It looks like soap, but I wouldn't advise touching it. pic.twitter.com/fDI3j0gmP7
— Jonathan Bloom (@BloomTV) November 18, 2016