Normally when I had some cable melt or GPU blow up a capacitor all it does is make the rig crash. Never led to an actual fire. However I was always worried.
Kept all the rigs on metal open air cases and on a metal rack and kept away from anything flammable. Also had extra smoke detectors near the mining rigs. So if anything happened when I was home I would run quick. If I wasn't home then that's another issue.
I guess you can have a remote smoke detector and some cameras, you see the rig go up in flames you can call the fire dept. No idea if it would help that much since you are remote however.
I did add a NEST temperature sensor by the rig to monitor that locations temperature as well as 1 large exhaust fan (a tall narrow one. Like an ionizing fan) and 1 Milwaukee fan to use for rapid cooking if needed. Will buy a fire extinguisher today, and the camera, I have an extra AXIS camera laying around so I’ll put it to good use .
Though, I was seeing if you guys have any software implementations in place, like if GPU hits X temperature or X power draw, then stop or alert via discord or something like that
For the temperature you have a built in option in HiveOS settings after you log in into your account and you can for example set an option if temperature of a card hits 80 degrees Celsius stop mining and you receive an email that a worker went offline after some minutes.I know this is not 100% what you are looking for but to a great extent can help you with that.