I grew bush beans for the first and last time this year, they have produced bushels and bushels but bending over for so long picking just kills my back. During the super hot dry weather I watered every day. All my other stuff has done really well also, been canning and vacuum sealing everything from salsa to three different kinds of pickles to frozen squash and zucchini, corn is coming in fast.
I think your beans will still produce as long as you still have blooms, don't spray for bugs if you can avoid it, still need as many bees around as possible.
I also learned a valuable bit of info several years ago while fishing in southern Mississippi about how to water plants, and you and everyone else may already know this but it went against everything I ever thought I knew about watering plants.
This farmer cropped thousands of acres and I watched the irrigation systems watering all these crop fields in the middle of the scorching hot day. I had always been told "don't water in the bright sun, it will scald your plants because the water droplets will magnify the sun's days.
I asked this very large scale, very successful Mississippi farmer about this and he said the opposite is true. You actually cool the leaves and hydrate at the most dangerous time of the day. The downside is evaporation is greater during this hot part of the day.
Anyway, hope your beans pick up