What I mean by pots is that with pots, although you have to water more, you can relocate them to get them out of the extreme heat of the day. I also pot tomatoes during the late Fall and into Winter. If a freeze comes, they can go into the house if needed.
Pretty much if no bugs are present for the OP, the problem he faces is molds and fungus. The tomatoes will still ripen, but production drops, the plant wilts and dies.