The previous maximum for the month of April in the Odisha state capital was 45 degrees recorded on April 23, 1985, said IMD director Sarat Sahu, who issued a warning for severe heat- wave conditions in some parts of coastal and north interior Odisha in the next 24 hours.
The mercury was touching 44 degrees by 11.30 AM and had risen to 45.8 degrees by 3 PM, IMD officials said.
Chandbali on the coast recorded a high of 44.4 degrees while the coal town of Talcher saw the mercury touch 43.8 degrees. The maximum at Jharsuguda and Sundargarh was 43.5 degrees.
The relative humidity level in Bhubaneswar went up to 90 per cent, making for sultry conditions that forced most people to remain indoors.
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Explaining the rise in temperatures in the state capital and other parts of the coastal region, Sahu said wind flow across Odisha was from the west in the morning but suddenly changed course to north-west by 9 AM, leading to the jump in the mercury.
With heatwave conditions prevailing across Odisha for one week now, the state government has received reports of at least 17 alleged sunstroke death cases.
"We checked four of the cases and found that the cause of death was other than heat-related incidents," Special Relief Commissioner (SRC) PK Mohapatra said after attending a high- level meeting presided by Chief Secretary AP Padhi.