Crews are still investigating what caused a fatal house fire in Sunnyside.
Firefighters responded to the fire that started around 11:30 last night.
25 firefighters battled the flames for about two hours before the fire was finally under control
One resident is dead after trying to escape from a second story window.
One firefighter said right now they know very little, but they are trying to recover the body.
"You never know. There is nothing saying where this occupant can be, we know the last sighting of her was in the south upstairs window," said District 5 Fire Captain, Joel Byam.
The coroner is working to determine the cause of death, but firefighters said it was probably either burns or smoke inhalation.
Due to the structural damage done to the house, a search for the body was hard to do at first. Fire crews had to demolish part of the house to get in and look.
It is not known where or how the fire started.
SUNNYSIDE, Wash. - The Yakima County Fire Marshall is working to find out what started a house fire just outside Sunnyside, that may have killed a woman.
Firefighters say the fire destroyed the home of Marty and Tami Mathison on the 1200 block of North West Crescent Avenue late Thursday into Friday morning.
Firefighters say when they arrived, the woman living there, Tami Mathison, was standing in an upstairs window at the back of the house, but when crews and her family told her to jump, she wouldn't. Instead, she turned around and walked back into the smoke filled window.
Firefighters say they haven't recovered or found her body, leading them to believe she died in the fire.
Firefighters say the second story of the home collapsed into the first story, and because of the structural damage, they couldn't go inside. Friday, crews plan to be back on scene with heavy equipment to search for the body.
The fire caused more than $200,000 in damages. The home was a total loss, as well as one car and part of a van.