Discussion
Consider the following statements regarding 'heat wave' :
1. Heat wave is considered if the maximum temperature of a station reaches at least 30 °C or more for plains.
2. Heat wave is considered if the maximum temperature of a station reaches at least 40 °C or more for hilly regions.
Which of the above statements is/are correct?
Answer: D
The answer is Neither 1 nor 2.
The India Meteorological Department's criteria are the other way round. A heat wave is considered when the maximum temperature of a station reaches at least 40 °C for the plains and at least 30 °C for hilly regions (with further conditions on the departure from normal). Statement 1 gives 30 °C for the plains and statement 2 gives 40 °C for the hills, so both are wrong.
The trap is that both figures are real thresholds, but swapped.
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