A mother and daughter were transported to Louisville with injuries Wednesday night after their Millwood home exploded. 

At 6:13 p.m. on Wednesday, the Leitchfield Fire Department was called to 129 Crawford St. in Millwood on a structure fire. 

Upon arrival, firefighters discovered the residence was already on the ground, having exploded due to a propane gas leak, according to Leitchfield Fire Chief Tim Duvall. 

Firefighters immediately started work to prevent surrounding structures and objects from being exposed to the flames and also tended to the injured residents. 

Prior to the incident, Angela Young and her 7-year-old daughter were exiting the residence due to the gas leak, and, as they were doing so, the home exploded, blowing them both into the yard, according to Duvall. 

Young sustained burns to around 80 percent of her body as a result of the explosion, and she was airlifted to University of Louisville Hospital for treatment. As of Thursday afternoon, she was in stable condition, Duvall said. 

The 7-year-old sustained burns to around 20 percent of her body and was also transported to Louisville for medical treatment. She was expected to be released within a day or two.

With no fire hydrants in the vicinity, Leitchfield firefighters came close to running out of water, but they formulated a system that prevented them from running out. 

The State Fire Marshal was called Wednesday to investigate the incident and determined the cause to be a faulty connection on the home's gas heater, which was the only appliance in the residence that took propane, Duvall said. 

The LFD cleared the scene at 9:23 p.m. Wednesday night and was assisted by personnel from Grayson County EMS, who took over patient care from firefighters, and the Grayson County Sheriff's Office, who provided traffic control.