Staying physically fit can help you
acclimate to a hot environment. Before you travel to or
work in a hotter environment, use gradual physical conditioning. This takes
about 8 to 14 days for adults. Children require 10 to 14 days for their bodies
to acclimate to the heat. If you travel to a hot environment and are not
accustomed to the heat, cut your usual outside physical activities in half for
the first 4 to 5 days. Gradually increase your activities after your body
adjusts to the heat and level of activity.
Be aware that when the
outdoor humidity is greater than 75%, the body's ability to lose heat by
sweating is decreased. Other ways of keeping cool need to be used. The
National Weather Service lists a
heat index each day in the newspaper to alert people
of the risk for a heat-related illness in relation to the air temperature and
humidity of that day. Direct exposure to the sun can increase the risk of a
heat-related illness on days when the heat index is high.
who have had heatstroke in the past may be more sensitive to the effects of
heat in the first few months following the illness, but they do not have
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
November 14, 2014
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this