Fire officials tell us the blaze started in a shed next to an area where food trucks park and serve customers. Because of the AstorTurf, the fire spread quickly to the dining area.
Firefighters say one or two sheds caught fire and they had to destroy another.
VIDEO: Witnesses capture massive plume of smoke from SPARK Social SF fire
A shed fire at a food truck park in San Francisco's Mission Bay sent a massive plume of dark smoke into the air.
Fire officials did say this was not an explosion, just a fast-moving fire because of the wind and the rubber AstroTurf which made the fire burn quickly.
There were about 50 people at the location when the fire broke out, officials say.
The owner of SPARK Social SF, Carlos Muela, said the sheds contained dry storage with things like glassware and wine. He is not sure what caused the fire but said they will be looking into it.
"Thank God nobody got hurt and luckily it wasn't during the rush hour around 4PM so there wasn't many people on site," said Muela.
PG&E was on scene but Muela confirmed there were no gas lines that where inside the sheds that burned.
So far, there are no reports of any injuries and officials haven't revealed what started the fire.