May 7 , 2022
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- A heatwave is declared when the maximum temperature is over 40 degrees Celsius and at least 4.5 notches above normal.
- India Meteorological Department said April was the hottest in northwest India in 122 years.
- It has also been an unusually hot April– with temperatures touching above 40 degrees Celsius – in large parts of Bihar, Jharkhand and West Bengal.
- The average maximum temperature till April 27 was 35.7 degree Celsius.
- This the highest in five years for this month.
- Based on absolute recorded temperatures, a heatwave is declared when an area logs a maximum temperature of 45 degree Celsius.
- A severe heatwave is declared if the maximum temperature crosses 47 degrees.
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