A man takes shelter under an umbrella on a hot summer day near the Vidhana Soudha, State Legislative Assembly, Bengaluru, on Monday. AFP

A 90-year-old woman and a 53-year-old man died in Kerala on Sunday, the Hindu newspaper reported, as temperatures soared to 41.9˚C, nearly 5.5˚C above normal. "We are yet to confirm whether these deaths were due to heatwaves. The medical process for examining the deaths is on," state disaster management official Shekhar Kuriakose said in the state capital Thiruvananthapuram.

Scientists have said climate change is contributing to more frequent, severe, and longer heatwaves during summer months.

Temperatures across Kerala, at India's southern tip, were expected to be higher than normal, causing authorities to issue warnings asking people to take precautions against the heat such as staying indoors.

In neighbouring Tamil Nadu state, a local politician was handing out fresh fruit, coconuts and cold drinks in Chennai to help people keep cool.

India's weather department has predicted more heatwave days than normal between April and June, when the monsoon will hit and temperatures usually fall.

In the eastern state of Odisha, where temperatures touched 44.9˚C on Sunday, the highest recorded in April, at least two people have died this summer of sun stroke, said Odisha’s public health director Niranjan Mishra.

Reuters