A fire at a west Lawrence home Monday night has displaced a family of four and caused an estimated $80,000 in damage to the house, a Lawrence-Douglas County Fire Medical spokeswoman said.

Division Chief Eve Tolefree said Tuesday investigators determined the fire at 3404 Oxford Court was an accident caused by combustible materials being too close to a water heater.

The fire was reported about 6 p.m. Monday at the residence near Bob Billings Parkway and Kasold Drive.

Jane Blocher, executive director of the Douglas County chapter of the American Red Cross, said the agency provided hotel lodging and financial assistance for food, clothing and other emergency needs to the parents and their two daughters. The family’s cat also escaped the blaze, Blocher said.

The family does have insurance, Blocher said, and are expected to be displaced from the house for quite some time.

“There is extensive damage in both levels of the house,” Blocher said.

According to Douglas County records, the home’s appraised value is $149,200.