Welcome soon to Sun City. Depending on where you are coming from, the heat can be somewhat difficult to adjust to. It can be a dry heat which can sap your energy quickly and you may not notice you are not drinking enough water. Just go a bit slower and do your shopping or your chores in the early part of the day. The first summer here we almost passed out crossing a parking lot due to not paying any attention at all to drinking water. We came from the northern part of CA where it was cold and rainy most of the year so we took a summer to get used to it. You may want to time your move so you can slowly adjust. We actually enjoy the heat now and look forward to summers here.