A: It's a systematic collapse of all systems, resulting in a catastrophic meltdown of the entire thermal network. Think of it as a thermal singularity – a point of infinite heat and chaos.
A: No. You'll need to perform a thorough recovery ritual to restore balance to the thermal forces.
A: Only if they're connected to the same thermal grid. In which case, they may experience a brief period of intense heat, followed by unforeseen consequences.