Haven’t looked back on this thread for a little while.
I had the same problem with apparent frost damage one day. I had one raised bed with kind of a rim or border to it. The plants all died down to the rim more or less. I am not sure if they will be a loss. I had another experimental bed that I put black mulch around. That one seemed to do well, even though it was lower.
We have the same problem in New England- the ground is bone dry. I have been watering every day.