Firefighters said the rural location, a collapsing structure and limited water access complicated the response.
DE SOTO, Mo. — Two people were found dead after a house fire broke out late Monday night in rural Jefferson County south of De Soto, drawing a long overnight response from several fire districts and an investigation by state and county authorities.
Authorities identified the victims Tuesday as Henry F. Heuer, 84, and Susan D. Heuer, 73. The fire drew attention across southern Jefferson County because crews arrived to find the house already engulfed and partly failing, then had to fight the blaze in an area without nearby hydrants. Investigators with the Missouri State Fire Marshal’s Office and the Jefferson County Sheriff’s Office are now working to determine how the fire started and whether any evidence inside the home can clarify what happened.
The emergency call came at about 11:41 p.m. Monday after a passerby saw flames at a home in the 4800 block of Upper Blackwell Road, according to De Soto Rural Fire Chief Tom Fitzgerald. By the time firefighters reached the property, the house was fully involved and the rear section was beginning to collapse. Crews spent hours working around the unstable structure and trying to keep enough water moving to the scene. Fitzgerald said there were no hydrants close to the property, forcing firefighters to shuttle water in tanks rather than connect to a fixed supply. The fire was eventually knocked down, and two people were later found dead inside the home.
Officials said the property’s rural setting shaped nearly every part of the response. In a town or subdivision, firefighters might be able to pull from a nearby hydrant and begin a more sustained attack more quickly. On Upper Blackwell Road, that was not an option. Fitzgerald said the shuttle system slowed operations and added pressure to an already difficult fire. He also said the home and surrounding property were crowded with belongings, which made the blaze harder to fight. The condition of the house added another problem: the structure had been built in the 1890s, according to the fire chief, and part of it was already giving way when crews arrived. Those conditions limited how aggressively responders could move in and increased the danger to firefighters working overnight.
The deaths also sent investigators down two tracks at once. Fire agencies focused on the burn pattern, the condition of the house and what physical evidence could still be recovered after the collapse. The sheriff’s office took the lead on the death investigation while the Regional Medical Examiner’s Office worked to identify the victims. Earlier Tuesday, sheriff’s office spokesperson Grant Bissell said authorities could confirm only that two adults had died. By Tuesday evening, the medical examiner’s office had identified them as the Heuers. Fitzgerald said he did not believe the fire appeared suspicious, but investigators had not announced a cause. He also said there may have been a lightning strike on the property on March 6, though officials have not publicly tied that to the fire.
The response stretched well beyond one department. De Soto and Festus fire departments assisted, along with the Hematite, Jefferson R-7, Hillsboro, Big River, Potosi, Mapaville, Dunklin and St. Clair fire protection districts. Valle Ambulance District also responded. Other agencies, including Cedar Hill, Rock Community and Antonia, helped cover additional calls while crews remained committed to the scene. Firefighters stayed there until about 7:15 a.m. Tuesday, showing how long the operation lasted after the initial flames were reported. In a small rural community, a major overnight fire can quickly draw support from across several neighboring districts because equipment, tankers and staffing all become critical when a structure is fully involved before the first units arrive.
Fitzgerald said the loss would likely be felt far beyond the burned house. In a brief public reflection, he said a small community carries these deaths heavily and that the emotional burden reaches both the victims’ relatives and the first responders who handled the recovery. Family members later confirmed the identities of the couple in local media reports, adding another layer of public recognition to what began as an overnight emergency call on a dark rural road. By Tuesday night, the fire itself was out and the victims had been named, but the central question remained unanswered: what ignited the blaze and how quickly did it spread through the old home before help arrived.
The investigation remained open Wednesday, with the cause still undetermined and authorities expected to continue reviewing scene evidence collected from the property.
Author note: Last updated March 11, 2026.