Unfortunately, the first heat wave wasn't the only one. I managed to bring the plants back from the brink a couple of times, but I think one of them may have a problem. It has red leaves and some dead outer leaves. From my online research, that could mean black root rot or verticillium wilt. Or, according to a horticulturist, it may just be going dormant for the winter. We'll have to wait and see if it makes it.
The other plant looks a lot better. And they are both giving me lots of delicious, tiny fruit.