Monday afternoon E-2, E-10, E-7, R-2, T-2, BC-2, Safety 1 and Command Aid responded to Middleground Rd. on a reported fire. E-2 reported heavy smoke in the air while enroute.  E-2 arrived onscene finding a single story mobile home with heavy fire showing with reported entrapments. E-2 pulled multiple lines while E-7 layed 1000ft of 5 inch for a water supply. E-11 pulled back up lines and conducted a primary search with R-2 conducting a secondary. Three occupants were taken to the hospital including one with severe burns.