The environment can pose a threat to you and your patients.
Heat, cold, wind, rain, snow, sun, insects, venomous animals, and endemic microbes can all complicate your ability to provide medical care and threaten your own health.
Learning to function safely in austere environments is an important aspect of operational medicine.
Medical Aspects of Cold Weather Operations US Army (pdf)
Heat Stress Control and Heat Casualty Management US Army (pdf)
Medical Problems in High Mountain Environments US Army
Heat Injury
Heat Injury Risk Management: Develop Controls/Risk Decisions
Heat Injury Risk Management: Heat Stroke
Heat Injury Risk Management: Identify Hazards
Heat Injury Risk Management: Introduction
Heat Injury Risk Management: Symptoms of Mild Heat Injury