Abstract: An outdoor fire prevention system preferably includes an existing roof structure with a plurality of first and second groups of water discharging assemblies. The system may also include a mechanism for automatically distributing water to a target group of water discharging assemblies by selecting assemblies from each of the first and second groups when sensors, located in the roof, indicate that the roof surface temperature, of a target region of is elevated above a maximum threshold temperature. The outdoor fire prevention system may further include a controller that is connected to a primary water shutoff valve in fluid communication with the automatic water distributing mechanism which automatically controls the amount of water transmitted to the system. The outdoor fire prevention system may also include a primary conduit in fluid communication with the primary water shutoff valve and traveling downstream therefrom, directing water where needed.