How does water, fire, and trees and hurt katniss in the book the hunger games?

They are survial tools. For example, the fire is used for warmth and for her bow and arrow when shooting. Another example is the water she uses it to hide and escape quickly during the beginning of the game or uses it as a source of thirst. A final example is the trees she uses them as a way to climb up and scope out the area of where she can go or hide from other players