Trudy, I hate to be the bearer of bad news, but I live in SW Arkansas, six hours away from Ideal in Cameron, TX and mine were shipped on April 9th, a Wednesday and didn't arrive till that Friday, the 11th. I lost two in shipping. I don't know if it was because it was still pretty chilly then or because the two DOAs looked smaller and were definitely crushed in the box. You have to realize that even when someone incubates their own at home, there will be chicks that may have enough strength to actually get out of their shell, but not enough strength to live. That may be what happened to my two.
Keep in mind that the people at Ideal are fully aware of the weather conditions, both hot or cold, when they ship chicks. Also, your chicks are not going to be in the heat all the time on their journey. They will be in the A/C of at least one post office along the way. As for food and water, a day old chick doesn't need that anyhow.
Hope you get them tomorrow, but don't freak if you don't.