It is very hot here, but I'm not sure that was the problem with my tomatoes. They didn't stop flowering, they almost didn't start, and by the time they set fruit, it WAS hot. I used to think I had too much nitrogen, (huge plants, no flowers) but I had a soil test, and I actually had too much everything but nitrogen. All the veggies were very slow to grow, flower, set fruit, ripen. I think I have fixed the soil.