Some mildews manifest as yellowing leaves, but they don't wilt like that iirc. I just mention it because I see green leaves in behind them, and this is how it can show up if the mildew spores are blowing in from one direction, landing on leaves in front. This type of fungus doesn't need actual wet leaves, heat and humidity are the conditions that it requires. If you see a directional pattern across the front (exposed) side of a number of plants where the wind is blowing, consider a directional source of mildew.
However I don't recall the leaves actually wilting.
I may have picked them off before they did..
In any case, KarenO's advice is sound. Take away the bad leaves, and give the plant a little time. I have never seen the fusarium, verticillium or bacterial wilt only in pictures, but as I understand it the plant has little time to live in that case.