The best follow-up question to make in this case would be: what has been done to change the signaling systems to locate the origin of a fire, especially so that the firefighters can get to it without depending on information given by a person.
The best follow-up question to make in this case would be: what has been done to change the signaling systems to locate the origin of a fire, especially so that the firefighters can get to it without depending on information given by a person.