The Harnett County Fire Marshal’s Office is reminding residents of the dangers sparked by burning materials near a home and the laws that prohibit it after a destructive fire — caused by an illegal burn — sent three firefighters to the hospital Wednesday. The Erwin Fire Department and Rescue Squad was notified of a large outside fire at 1045 Antioch Church Road at 3:35 p.m. Wednesday. Six minutes later, Erwin’s Assistant Fire Chief John Wilkins upgraded the incident to a “fully-involved residential structure fire,” according to a release from Fire Marshal Rodney Daniels on Thursday. Wilkins said the rear of the home was fully-involved when they arrived on the scene along with the Dunn Fire Department. It didn’t take long for the fire to spread. Firefighters were attacking the blaze around 4 p.m. when a roof collapsed pushing three of them back. They were not under the roof when it caved in.