premise: RICE COUNTY, Kan. (KSNW) – Rice County fire crews are on the scene of a building fire at the Jacam Chemical facility. According to Rice County officials, at least four fire departments are battling the blaze at the north plant. Ave Q is closed from K-14 to 18th according to Rice County Emergency Communications. All employees are accounted for and safe. KSNT News’ sister station KSNW-TV has a crew near the scene.
hypothesis: There are at least two fire departments battling a fire in a Jacam Chemical facility plant. 
reason: The context says "at least four" fire departments are battling the fire, so it is also correct that "at least two" are battling it. 