Heat Illness:
http://kidshealth.org/en/parents/heat.html?WT.ac=p-ra#
http://www.emssafetyservices.com/2014/08/19/heat-related-emergencies/
Cold Illnesses/Frostbite:
http://kidshealth.org/en/parents/frostbite-sheet.html?WT.ac=ctg#catsheets
http://www.emssafetyservices.com/2014/11/19/cold-across-us/