'Colossus' a 1,100-pound robot helped extinguish Notre Dame fire spots

One sensor I can imagine is of utmost value in an emergency response robot (besides for temperature and visibility) would be for detecting electrical currents on the wet surfaces through its caterpillar tracks before human firefighters enter the area.

I don't know how many firefighters get a jolt before the electrical mains is shut down, but I bet it is something that crosses their mind once or twice when the water begins to flow.