See link below, this type of structure wildfire protection system
may have helped in this disaster. It has been available for several years now, interesting to see if anyone in the fire zone had one operating. It appears to use standard lawn irrigation rotors and sprays which are my line of work for the last 26 years. I haven't checked the supply specs but ideally it needs a backup power supply (batteries) and a reserve water supply (cistern) in case of utility loss. These types of sprinklers are ineffective when winds get above 25 mph, too much spray drift.
https://www.frontlinewildfire.com/protect-home-with-roof-wildfire-sprinkler-system/
I had a simple design I dreamed up using a single rooftop mounted Hunter G90 golf course rotor rated at 60 GPM, having a spray radius of 88ft but needs 90psi. a 3hp pump and 3,600 gallons for every head and hour of use!