Paul,
I just look for the Flashlight ...
It must have been a short-lived problem. Around 4:30 p.m. the lights suddenly came up brighter and when I looked at the meter the line was up to 238V. No problems since!
Trumpy,
If nothing else, couldn't you get the PoCo for failing to maintain the supply within required tolerances? I'd say 6kV+ is a little out of tolerance for a 240V supply...