Heat. It's very hot and humid in Davis right now. Probably in July too. I just went to my L&S orientation but it's probably very different from the freshman one because ours is only a day long and we don't need tests or anything . . . the one thing I can tell you is that if you don't want to get sunburned bring some sunblock or something, don't wear heavy clothing, bring/drink a lot of water. Seriously. Some people in my group almost fainted because it was 101 on the day we went and we had to walk across campus twice in the sun. Ugh.