I'm in your zone but in CA...seems odd. We really don't get to 110. You'll have to figure out the watering, but I water about 3x a week at this time. It hasn't gotten too hot yet, just in the low 80's. Sometimes one of the pumpkin plants wilts a little, but I check the soil and if it's damp down a couple of inches I don't worry. If you mulch around the base of the plants, not touching the stem, it will help a great deal to retain moisture.

Bearing in mind that I've only grown pumpkins once before and my advice is worth all of 2 cents-- why don't you plant now? I planted mine quite some time ago and have green as well as orange pumpkins at this point. Last year I picked the pumpkins when the vines started to look bad, and it was well before Halloween. I sat them on a clean dry surface in the shade, and they lasted over a month until Halloween. Just keep them dry underneath, no insects hiding, and avoid breaking the skin with any cuts. Don't pile them on one another.

Thanks, I am planning on starting tomorrow, our forecast for this week is above 110 everyday with a lows of 90, so I am just throwing them to the fire, oh well I'll see how it goes.

Can you erect some sort of shade device for the seedlings until they get established?

Well I have been thinking on that and have decided to plant corn interspersed in a three sisters fashion not sure about going with the beans though but in the mean time I was thinking of putting plastic milk wires over them while they germinate and for a short time after to help them get established this will let sun in but have a fair amount of shade as well, also protect them from the little rabbits, they never seem to bother my plants much but do like to burrow down a little to give themselves a cool place to hangout.