India To Launch Its Own Heat Index:
India to launch its own heat index next year to quantify heat hazard, generate impact-based heat wave alerts for specific locations.
- Heat index is a measure of how hot it feels when humidity is factored in along with the air temperature, and the figures were calculated using data from the India Meteorological Department (IMD).
- It is also known as the apparent temperature.
- When the body gets too hot, it begins to perspire or sweat to cool itself off.
- If the perspiration is not able to evaporate, the body cannot regulate its temperature.
- Evaporation is a cooling process.
- When perspiration is evaporated off the body, it effectively reduces the body’s temperature.
- When the atmospheric moisture content is high, the rate of evaporation from the body decreases.
In other words, the human body feels warmer in humid conditions.
- The opposite is true when the relative humidity decreases because the rate of perspiration increases.
- The body actually feels cooler in arid conditions.
- There is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).