Street light faults usually knock out half a district at once here, which could mean areas of roughly 1 square kilometre or even more (densely populated). In summer or early fall there was an attic fire in a 4-storey-building several hundred metres from my home. I think it's 4 1/2 blocks from us. For the fire brigade to get up there in the not too wide street (2 narrow lanes, parking and side walk on each side) they had to cut the overhead cable for the street lighting. It looked impressing! It was dead but only the mechanical reaction... the remaining lights flexed back a good metre when the triplex (2 phases switched individually for switching off half of the lights at midnight + neutral, 230V, no ground as all street lights are class II) was cut. That happened in the afternoon (I think it happened around 5 PM) and knocked out half the district until 8:30 PM. Yesterday we had another failure of that dimension or even bigger. Me and a friend talked to the faultsman a little when he was done. I don't remember all of it and some of his explanations were somewhat blurry, but apparently the line wasn't deenergized but only switched off during daytime. The automatic start tried to switch on, detected a fault, tried again and again and knocked out larger areas with each try.