Answer: With hot, humid, rainy weather comes disease...so I wouldn't be surprised if your plants are suffering some sort of blight. However, it could be other things too. The flower does wilt and drop once it's been pollinated, so keep your eyes out for tiny tomatoes. Excessive heat (above 90) will cause flowers to drop before developing fruit, so if the rest of the plant looks fine and you've had hot weather, that could be it. If so, once the weather cools things should get back to normal. I'd leave the plant as is, and see what develops. Keep an eye on the foliage--if you see spotting or browning on the leaves, that would indicate it is indeed disease. I hope not!
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