(Walla Walla, WA) -- Governor Kate Brown has invoked the Conflagration Act to send firefighters to help battle the Elbow Creek Fire about 30 miles southeast of Walla Walla. The fire has grown to nearly eleven-thousand acres since it started on Thursday. Incident commanders say winds are making the fire erratic with fast growth. Thunderstorms are forecast for Monday night. The fire is threatening 156 homes, and it's ten-percent contained.