Well the bees have been slurping down the syrup. I have been putting on a new pint jar of syrup every day and every day it is empty when I check it. They seem to be happy.
On Monday (record breaking heat) the bees were bearding up on the front of the hive. I slipped a stick under the front cover to allow some ventilation. By Tuesday they were back to normal. I'm going to wait until the weekend to go back into the hive and see what they have been doing.