Hazardous materials experts with the Los Angeles Fire Department were called to a scene after residents reported an odor of possibly flammable vapors in Hyde Park on Monday.
Firefighters were called to the area of 2820 W. Slauson Ave. around 5:30 p.m. to determine the source of the odor.
LAFD asked occupants from the investigation site and two adjacent buildings to leave the immediate area until it is deemed safe.
Firefighters eventually discovered multiple large containers of paint and painting-related chemicals in one of the buildings.
The fumes fully dissipated, LAFD said in an incident log. The nearly 30 residents who were evacuated have returned to their homes.
Slauson Avenue between Sixth and Eighth avenues was fully closed while the investigation took place. It has since reopened.