Fire In Northeastern Wyoming Grows To 5,000+ Acres A wildfire burning in Sheridan County has grown to more than 5,000 acres in size but crews expect containment to grow dramatically on Thursday. According to the Deer Creek 2 Fire page, 100 personnel are currently working the fire, where containment has grown to 15% as of 9 a.m. July 29. Get our free mobile app On Thursday, firefighters expect cooler temperatures and moisture to decrease the fire's potential to spread. Vegetation is also becoming sparse, meaning mop-up operations currently aren't necessary. Additionally, crews are now facing muddy conditions, which have presented firefighters with new challenges moving forward.