Reporting
tomatoes & lack of fertilizer or water
You're plants could be 'wilting' due to lack of water. Once the plants begin to flower it takes more energy to produce flowers and fruit. You'll need to fertilize now and increase the water you give. Tomatoes LOVE water, they are mostly water so you have to give water and fertilizer to get good tomatoes. Also if they are really 'tall' they may be 'leggy' and need pinching back. Bushy is better than leggy in this case. Good luck~Nanette