Current Watches and Warnings
South Dakota, McPherson
Public Information Statement
Statement as of 5:52 AM CDT on April 29, 2016
... South Dakota severe weather awareness week... day five...
... Extreme/excessive heat...
In the last 10 years... a National average of 219 people have died as a
result of health problems directly related to excessive heat. Considering
this death toll... the National Weather Service has stepped up its efforts
to more effectively alert the general public to The Hazards of heat waves.
Based on research findings... the National Weather Service devised the heat
index (hi). It is an accurate measure of how hot it really feels when the
relative humidity is added to the actual air temperature. It is important
to note that since heat index values were devised for shady... light wind
conditions... exposure to full sun can increase values by up to 15 degrees.
Heat disorders generally have to do with a reduction or collapse in the
ability of the body to shed heat by circulatory changes and sweating. In
other words... a chemical imbalance caused by too much sweating. When heat
gain exceeds the level the body can remove... or when the body cannot
compensate for fluids and salt lost through perspiration... the inner-core
temperature of the body begins to rise and heat-related illnesses may
develop. Ranging in severity... heat disorders share one common feature:
the individual has over-exposed or over-exercised for his/her age and
physical condition in the existing thermal environment.
The National Weather Service will issue advisories or warnings when the
heat index is expected to have a significant impact on public safety. The
common guidelines for the issuance of excessive heat warnings is when the
maximum daytime index is expected to reach 105... and the nighttime low
temperature does not fall below 75 or 80 degrees.
1. Slow down. Strenuous activities should be reduced... eliminated or
rescheduled to the coolest time of the day. Individuals at risk should
stay in the coolest available place... not necessarily indoors.
2. Dress for Summer. Lightweight... light-colored clothing reflects heat
and sunlight and helps your body maintain normal temperatures.
3. Put less fuel on your inner fires. Foods such as proteins that increase
metabolic heat production also increase water loss.
4. Drink plenty of water or other nonalcoholic fluids. Your body needs
water to keep cool. Drink plenty of fluids... even if you do not feel
thirsty. However... those who suffer from epilepsy... heart... kidney or
liver disease... are on fluid restrictive diets... or have a problem with
fluid retention should consult a physician before increasing their
consumption of fluids.
5. Do not drink alcoholic beverages.
6. Spend more time in air-conditioned places. Air conditioning in homes
and other buildings markedly reduces danger from the heat. If you cannot
afford an air conditioner... spending time each day in an air-conditioned
environment during hot weather affords some protection.
7. Be careful not to get too much sun. Sunburn makes the job of heat
dissipation that much more difficult.
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