Last Updated: Apr 15, 2021 12:00 PM Grey Highlands Fire Logo A propane explosion at a farm in Grey Highlands has sent three residents to the hospital. Grey Highlands Fire Department confirms the fire occurred Tuesday (April 13th) morning on Grey Road 12 outside of a barn where a propane tank exploded. Two people were sent to the London Burn Centre, and a third person to a local hospital for what Grey Highlands Fire Chief Marty Wellwood describes as significant third degree burns. The Fire Department and other emergency services were on the scene around 8:45 a.m. Tuesday. Wellwood says the damage was minimal except to a tractor trailer.