Closed for a week schools will remain closed in many parts of India due to the heatwave as the mercury shows temperatures that exceed 40 degrees Celsius.

In at least two states – Tripura in the northeast and West Bengal in the east – schools will remain closed this week as temperatures soar 5 degrees Celsius above normal levelsthe state governments announced.

Calcuttathe capital of West Bengal, recorded temperatures of 40 degrees Celsius on April 13 and 41 on April 14, more than five degrees above normal for this time of year, JK Das, an official at the state’s health department, told Reuters Meteorological Service.

On February the national meteorological service had announced that India was likely to experience heat waves during March-May.

The average maximum temperature in February in India was 29.54 degrees Celsius–the highest since 1901, when meteorological records began to be kept.

Scientists have linked the early onset of high temperatures to climate change and they argue that over a billion people in India and neighboring Pakistan are somehow vulnerable to extreme heat.