So how do potato buckets stand to hot weather and a week of no watering?

Was away for awhile and could only top up the buckets with water as a scorcher loomed and they'd have to spend over a week without any more help from me. Did fairly well in the end, I think if plants returning to some green leaves amongst the burn is any indication. The tall corn plant growing from one bucket really recovered nicely - must be the sort of plant that's used to that sort of cycle.

One particular plant seems pretty badly burned though. Or perhaps it's more nitrogen burning - it's in a bucket with a lot of grass - the plant seems to be dying from the base upwards.