The Heat Index Chart [yellow=caution, orange=danger, red=extreme danger).
Source: NOAA NWS (http://www.spc.noaa.gov/wcm/)

Excessive Heat

Extreme heat conditions (e.g., heat waves) can occur in most regions of the U.S. High temperatures combined with humidity can be extremely hazardous and can result in heat-related illnesses and even death. The Heat Index Chart is used to help monitor extreme heat conditions. The heat index is the temperature the body feels when the effects of temperature and humidity are combined and indicates the likelihood for heat disorders, especially with prolonged exposure or strenuous activity. Heat advisories are initiated when the heat index is expected to exceed 105-110°F for at least two consecutive days.

Extreme heat and high humidity situations can be life threatening, but knowing those at greatest risk and taking the necessary precautions can help to prevent this from occurring. Most cases of illnees or death occur in individuals that have been overexposed to heat or have over-exercised for their age or physical condition. Young children, the elderly, individuals with chronic illnesses or obesity are at highest risk, but even young and healthy individuals be affected if they participate in strenuous physical activities during hot weather without taking precautions. Animals can also suffer heat-related illnesses, which can also be life threatening.

The following resources will help you prepare your family, home and farm, animals and business for excessive heat situations.

Additional Web Resources

Extreme Heat Resources
Website with tips on heat prevention, affects on elderly and what you should know about heat.
Centers for Disease Control and Prevention (CDC)
Extreme Heat Resources
Website with information and links for preparing for extreme heat situations.
Environmental Protection Agency (EPA)
Extreme Heat Resources
Website with extreme heat terms, as well as how to prepare for extreme heat, what to do during and after.
Federal Emergency Management Agency (FEMA)
Handling Heat Stress in Cattle
Factsheet discusses how to identify and respond to heat stress situations involving cattle.
South Dakota State University Cooperative Extension Service
Health Warning: Preventing Heat Stroke in Pets
ASPCA Blog discussing ways to prevent pets from having a heat stroke
The American Society for the Prevention of Cruelty to Animals (ASPCA)
Heat (Heat Wave)
Document on extreme heat emergencies, how to prepare before they occur, and treat heat-related illnesses.
National Disaster Education Coalition
Heat Stress
Factsheet discusses symptoms of heat stroke and exhaustion and the emergency procedures associated with these illnesses.
Ohio State University Extension
Heat Stress in Dairy Cattle
Factsheet includes indicators of heat stress, suggestions for reducing heat stress in dairy cattle.
University of Arkansas Division of Agriculture Cooperative Extension Service
Heat Stress, Fairs, and Achievement Days: Animal Considerations
Animals considerations in heat
South Dakota State University Cooperative Extension Service
Heat: A Major Killer
Website of information about heat wave warnings, hazards and preventive actions.
National Weather Service (NOAA NWS)
Hot Dog! How to Keep Your Pet Cool
ASPCA Blog listing precautions to help prevent pets from overheating
The American Society for the Prevention of Cruelty to Animals (ASPCA)
Hot Fun in the Summertime: Pet Safety Tips
ASCPA Blog containing pet safety tips for the summertime
The American Society for the Prevention of Cruelty to Animals (ASPCA)
Hot Weather Tips
Companion animals and excessive heat.
The American Society for the Prevention of Cruelty to Animals (ASPCA)
Keep Your Pets Cool in a Heat Wave
Website containing hot weather tips for pets
U.S. Humane Society
Managing Heat Stress in Feedlot Cattle
Factsheet discussing ways to manage heat stress in feedlot operations.
University of Minnesota Extension
Surviving the Hot Weather
Information on recognizing and treating different types of heat related illness.
National Safety Council