One of natures most powerful forces, early detection is critical in fighting any forest fire. Thankfully we don't have to wait for the skies to turn dark before a fire is detected. There are now may ways of becoming aware of fires, even at considerable distances and automated ways of protecting property.
Satellite monitoring is the first line of defence, with numerous agencies (including NASA) offering worldwide free alerts. External smoke detectors, specialized infrared cameras, remote high temperature sensors, CO & CO2 gas sensors create a very comprehensive detection system, with warning and alerts delivered to any number of phones & email address.

knowing about a fire and not being able to do something about it is not much use, but an intelligent automated system can, even if there is no one nearby.
Once the presence of fire near the property is detected, water sprinklers are automatically deployed around the perimeter using all available water sources to supress the fire, or at the very least minimize any damages.
As electricity is one of the first utilities to fail during forest fires, the entire system is fully self sufficient and will operate with or without human supervision.