Water will help them heal. If it was earlier in the season, I'd say fertilizer, too.
Here is a memory of losing it all about now, as we move into late August.
I don't really remember my growing season frost dates when I lived several hundred feet higher. Around here where I am
now, there was one year with a frost in August.
It wasn't a hard frost but it caught me by surprise and I felt lucky that it only killed some cucumber leaves and such. I went around and showed some folks a leaf and laughed about how it was so minor.
I wasn't laughing long. The cool weather continued and everything stopped growing during the week or so that was left to the season. I felt cheated! But ... I knew there would be another year.
One thing that gets me through problems is not only my years of gardening but the many things that I grow. Usually,
something will find the conditions to its liking.
@Hal suggested what I'm using as a signature this week

. There is another diversity advantage I'm blessed with - having gardens in more than one location. Some folks would think that is a terrible bother but it gets me some more "depth to the bench."
It's all pretty darned exposed to whatever wants to come at it but distance makes for differences. Let's stretch that a bit ... it's true here on TEG, too

. Talking about our successes and failures helps me gain some balance, be a better gardener and stay optimistic - just as
@baymule says.
Steve