Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Example of heat illness risk assessment charts. A) Heat index value is determined from temperature (°C) versus relative humidity (%). B) The risk of heat illness is estimated from the heat index value.
Note: The values for heat index are based upon shady, light wind conditions. Exposure to direct sunlight can increase the heat index by up to 9°C (15°F). Information adapted from http://www.crh.noaa.gov/pub/heat.php.
