Story highlights

The blaze started Monday afternoon

The cause of the blaze is unknown

About 800 acres have burned

(CNN) —  

A wildfire in Washington has firefighters calling for backup and forced evacuations in an area in the central part of the state.

The blaze, that started Monday afternoon, has scorched about 800 acres and threatens some 100 homes, the Washington State Patrol said

Authorities have started evacuations and asked state firefighters to assist local departments in extinguishing the fire, according to the State Patrol.

The blaze is located near the city of Cle Elum in Kittitas county, an area about 80 miles southeast of Seattle.

It is unclear what caused the fire.

One home was burned in the blaze, CNN affiliate KIRO-TV reported.

CNN’s Greg Morrison contriubted to this report.