Tops not ripening

[enchant]

This has been an unusual season for tomatoes here in New England - perhaps in many parts of the country. Worst drought we've seen in many years. Fortunately, things haven't been bad enough that we've had water rationing in my town, so I've been able to water my plants every other day or so. No shortage of sunshine, which is a good thing.

Personally, I've had a pretty good season so far. Tons of tomatoes being harvested. Pretty good size and all. Other growers I've talked to are having a horrific season, though. 2.5" fruit where they normally see mostly 4". Perhaps I'm giving more attention to my tiny garden than they can spare for their fields.

However, and especially lately, I'm seeing a lot of tomatoes that aren't ripening on the top. I've been growing for maybe seven years now, and I don't think I've seen one like this, and now maybe 20% of my harvest is like this.

Might this be drought related? FWIW, I pick my fruit at first blush, and they seem to ripen just fine. I mostly grow Celebrity, Big Beef, Brandywine and Rose. The problem seems to span all my varieties.

Edit: I just went out to harvest for the first time in a couple days and now easily half of them have this problem.