Shade them. Otherwise you might have sunburned fruit. Make a shade sail for them with landscape fabric or screening. It is very hot and dry here and I also give them some water at night to help perk them up.
Hi Kimberly, Tomatoes love hot, sultry weather. I do a deep water method. I use a soaker hose, which is really just a long hose with pin holes down its length. I have it threaded in and around my plants. I turn the hose on every morning for 20 minutes. The soaker hose waters the soil, not the leafs. Some people put pipes in the soil next to the plants and keep water in them. Best of luck to you.