I think having a baby in March like I did with DS was one of the worst times as I was pregnant the WHOLE of summer and where I live it got to 43 degs some days which nearly finshed me off.

What did I do:

Yelled at my DH to fill up the ice cube tray as everytime I went to get a cool drink there was one cube left... Grrrr,

Went to the pool alot, was nice paddling about

Cool showers

I sat in front of the air con a lot of the day.

I used to fill up a little wading pool and let my DD splash about and I just soaked my feet in the water while I watched her. Having cool feet seemed to do the trick for me.

Wore thongs.

Drank heaps of water, I always have though.

I've had one summer baby and one Winter, Winter was definately the most comfortable until you had bubs and had to get up in the freezing cold to b/f. Look at the positives, at least you won't freeze when you get up during the night to feed bubs.