Definition
Programs that issue bulletins to warn the public that unusually hot weather has been forecast and provide safety instructions for vulnerable individuals which may include the suggestion that they remain in their homes if air-conditioned or find appropriate shelter. When temperatures and the heat/humidity index are expected to be 100 degrees Fahrenheit (or higher, a heat advisory is issued. A heat warning is issued for temperatures and/or heat indices of 110 degrees Fahrenheit or higher. The exact combination of indices may vary between jurisdictions and may include factors such as dew point, cloud cover, humidity, wind speed and direction, and the duration of the hot spell. Extreme heat can be very dangerous when combined with high humidity or drought conditions.
URL Name
TH-2100-9500-170
Third Level Code
TH-2100
Taxonomy Code
TH-2100.9500-170
Parent Code
TH-2100.9500
Family Code
T
Second Level Code
TH
Fifth Level Code
TH-2100-9500-170
Fourth Level Code
TH-2100-9500
Use References
Extreme Heat Warnings, Heat Wave Advisories, Hot Weather Advisories
Publication Status
Online