It's best to stay in place if you are lost. Carry a whistle and small mirror for emergency use. First Aid Kit Always carry a kit with you. Minimum Safety Kit Treating Hypothermia Make sure that you always have this equipment with you, especially on day hikes. Weather in the Sierra can change rapidly, backcountry users should be prepared for all types of weather.
Winter weather can be extremely unpredictable.
Strong winds and snow can appear suddenly. Summer showers and thunderstorms usually appear during the day, but usually do not last for very long. Under a tree or other tall feature for emergency 2. Exposed on a high place 3. On wet, marshy soil 4.