Crews from Toppenish, Yakima County and Zillah fire departments respond to a structure fire at Toppenish Public Works in Toppenish, Wash., Wednesday, Aug. 23, 2017. Several city vehicles, two employee vehicles, various tools and one of the department’s buildings were destroyed in the blaze at an estimated $1million. The cause is under investigation. (SHAWN GUST/Yakima Herald-Republic)

TOPPENISH, Wash. — Investigators and insurance adjusters continue to comb through the remains of the city’s Public Works building to assess damage and determine a cause for the fire.

Public Works employees are making an inventory of what was in the building when it was gutted by fire Aug. 23, City Manager Lance Hoyt said. Representatives of the city’s insurer, Washington Cities Insurance Authority, also are assessing the damage.

The fire started around 2:40 p.m. when an employee was cleaning a paint sprayer and something ignited the paint, Fire Chief Timothy Smith said. The fire quickly spread through the 113-year-old building, which was used as a workshop, storage area and break room.

Attempts to contact Smith on Tuesday were not successful. He did not return calls by press time.

Officials estimate the damage will exceed $1 million, which includes the loss of six city-owned trucks and two employee vehicles.