I hope your move goes well!! I moved out here inSeptember with my baby boy, he is now 7 months and has loved being here so far. I have found the supermarket Spinneys really good for baby milk and foods, you will pretty much be able to find everything you need here!!
As for the heat, it is now cooling down, so it is much easier to go out for walks etc...my son is quite happy in a vest and sun hat, with lots of sun cream!! When we arrived it was around 45-48 degrees every day, that was really hot for him having come from Scotland!! Hence I just made sure he was never outside for too long and I gave him cooled boiled water in between very feed. We use bottled water as I am not so sure about the tap water...the smell to me is not fantastic. We have canisters of water at the house which we have delivered every week for drinking and cooking with.
I really wish you all the best with your move!!