A major response is underway by Central Oregon fire agencies to assist with a brushfire on the Warm Springs Indian Reservation that has already spread over thousands of acres.  This human-caused fire was discovered around 10 AM this morning (Saturday) and had spread over 5000 to 7000 acres by late this afternoon.  According to Assistant Fire Manager William Wilson, the fire has closed Highway 3 on the reservation between Holiday Way and Highway 8.  Officials expect it to grow to 10,000 to 12,500 acres of rangeland.  There were some evacuations along Dry Creek Road and in the Dry Creek Campground.  As of 6 PM, there have been no injuries and no structures burned.