Hi there. My 18 month old and I are visiting my parents, and of course arrived in the middle of a heat wave. Current temps are 35-40, which is about 100 to 110 I believe. We are not used to this kind of heat at all...abnormal for us. I am following the APA guidelines and think I have most of it covered. Sunblock, a hat, lots of fluids and I am pretty comfortable as to what to watch for in terms of signs of heat exhaustion/heat stroke. My question is how long should I allow him outside at any given stretch. He wants to be outside all the time, and right now I am doing about 30 to 40 minutes, then bringing him in to the air conditioning to rest and cool off, then letting him back out. Am I being overly cautious in the length of time outdoors, or not cautious enough? Again, this is not usual temps for us so he is not accustomed to extreme heat, and he is also very very fair skinned. I want him to have fun, but want to make sure I am avoiding any problems as well. Thanks so much, I appreciate it.