Walter Foxcroft, a 43-year-old physical therapist and owner of Havasu Health and Hyperbarics, was killed late on 9 July when a flash fire erupted inside a hyperbaric oxygen chamber at his clinic in Lake Havasu City, Arizona. Emergency crews arrived just before 11 p.m. to find the building filled with smoke and the chamber in flames; Foxcroft was pronounced dead at the scene. No other injuries were reported. Hyperbaric chambers are pressurised enclosures that deliver high concentrations of oxygen to treat conditions such as decompression sickness and non-healing wounds. The elevated oxygen levels make the devices highly flammable, and investigators from the Lake Havasu City Fire Department and local police are examining the cause of the blaze and why Foxcroft was inside the chamber outside normal business hours.