Читать книгу Weather For Dummies - John D. Cox - Страница 33

The National Weather Service’s Heat Index, shown in Figure 2-1, shows apparent temperature values — the temperature that the body actually feels — which is more important than simply the heat or the humidity of the air. It is not just the heat or just the humidity, but both of these properties that this index combines to more accurately reflect what your body is going to have to cope with. The numbers in the index are based on shady, light wind conditions. Full sunshine exposure can raise these numbers by as much as 15 degrees Fahrenheit.

FIGURE 2-1: This Heat Index was devised by the National Weather Service to show the temperature the body feels when the heat and humidity are combined.

Here are some valuable health guidelines from the National Weather Service:

 Between 80 degrees and 90 degrees on the Heat Index, be on the lookout for signs of fatigue with prolonged exposure or physical activity.

 Between 90 degrees and 105 degrees, with prolonged exposure or physical activity, you may experience sunstroke, heat cramps, or heat exhaustion.

 Between 105 degrees and 130 degrees, you are likely to experience sunstroke, heat cramps, or heat exhaustion.

 At 130 degrees or above, dangerous conditions of heat stroke or sunstroke are highly likely with continued exposure.