Do things as early in the day as you can. If you do not have a handicap placard get one so you do not need to walk as far. Put a ball cap in the freezer after getting it damp, bandana, they even have scarves with beads.
Alex
Hi jc and welcome to our little MS community,
Sorry to hear about your diagnosis....what happens to you with heat exposure (Uhthoff's phenomenon) is unique to you and its one of the things that can take some juggling and time to work out what helps you the most, there are products that keep your body cooler eg Cooling Vest, neck wraps, hand held fans etc that you could give a try..
Hope that helps.......JJ