This document summarizes first aid procedures for heat exhaustion, heatstroke, hypothermia, and frostbite. It outlines signs and symptoms of each condition and provides guidance on first aid management. For heat illnesses like heat exhaustion and heatstroke, first aid includes removing the person from heat, cooling their body, and providing fluids. For hypothermia, treatment ranges from removing wet clothing and adding dry layers for mild cases to calling emergency services and performing CPR if needed for severe cases. Frostbite treatment involves gently warming affected areas and seeking medical help.