At least 13 districts experienced maximum temperature above 40 degree C while the highest temperature was recorded at Sambalpur (46.1) followed by Hirakud (45.6), Talcher, Bolangir (45.5), Titlagarh, Sonepur (45) and Sundergarh (42.5).
The state capital here experienced 40.4 degree Celsius with relative humidity ratio touching 74 per cent.
"Heat wave condition would prevail over some parts of interior area during next 48 hours, while uncomfortable sultry condition may prevail over some parts of coastal districts," a Met office warning said, adding that temperature in southern and western parts of the state would remain above 40 degree Celsius at least till May 25.