PowerPoint Presentation

EXTREME COLD AND EXTREME HEAT

EXTREME COLDHumans are warm-blooded- we have adapted to keep our body close to 99F.When the air starts getting colder- you shiver. Shivering causes your muscles to do work, and thus create heat.Hypothermia- your body temperature actually begins to dropFrostbite- freezing of body tissue

EXTREME COLDWind Chill- what the air feels like due to the wind blowing.

Example: A wind chill value of -20 F does not mean its actually -20 F , it means your body is cooling as though it were -20 F with no wind.

EXTREME HEATSunburn is caused by UV rays. This can occur with sunshine, snow and ice. The UV index is a chart to help us know when to take caution.Strong links exist between sunburns and skin cancer.

And yes.African Americans can get sunburned, too!

EXTREME HEATWhen its hot outside, more blood circulates throughout your body and your heart has to work harder.You also sweat more, depleting your body of water and needed salts.The heat index tells you what it feels like based on the temperature and the humidity.

EXTREME HEATHeat exhaustion can make your stomach upset, make you feel clammy and can possibly make you faint.

Heatstroke can cause rapid pulse, unconsciousness and death.Heat is one of the leading weather-related causes of death.Elderly and poor people are most affected.