Curling leaves & wilting tomatoes
Tomatoes will naturally curl their leaves in the heat, so it could just be the hot temperatures. I am not clearly seeing any wilt--are you just referencing the natural downward direction of the leaves on the lower part of the plant?
Consistency in water is key. You may consider watering in the morning so the plants have the water available during the hottest part of the day. Tomatoes also use a lot of water, so not knowing how much you're irrigating with (or how frequently), this could be a cause too. Keep the soil evenly moist as best you can. You can stick your finger into the media to determine if it's wet or dry. You can also buy a soil moisture meter if that helps.