Berries Too Cold

I think I may have let the raspberries get too cold one night last week.  When I got up in the morning it was 27F at about 5am.  I didn't check to see how long it was down that low, but I figured it had to be quite a while.  I've only run the heater for a few nights this fall, so I turned on the heater in the high tunnel, but I think it was too late. The quality of the ripe berries is poor. I'm hoping that the berries that are still unripe will ripen well, but we won't know until we get some sun on the plants and see how they move forward.  Guess we'll know as the week goes on.