Most Americans aged 65 years and older aren’t going to face the dangers of hypothermia in their cars during a snowstorm. However, they can be vulnerable to hypothermia because their body's response to cold can be diminished by underlying medical conditions such as diabetes, some medicines including over-the-counter cold remedies, and aging. As a result, hypothermia can develop in older adults after even relatively mild exposure to cold weather or a small drop in temperature.
When the temperature gets too cold or the body's heat production decreases, hypothermia occurs. Hypothermia is defined as having a core body temperature below 95 degrees.