Tahoe Donner. Defensible space is your property’s frontline of defense against wildfire. Creating and maintaining defensible space around your home can dramatically increase your home’s chance of surviving a wildfire and improve the safety of firefighters defending your property. CAL FIRE statistics show that properties in compliance with defensible space requirements are five times more likely to survive a wildfire. The Tahoe Donner Forestry Department is intent on helping homeowners bring their properties into compliance with state, local and association fire safety standards.