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In Haryana, Narnaul town sizzled at 45.5 degrees while Hisar saw a high of 45 degrees Celsius.
While temperature in Narnaul was eight degrees above normal, in Hisar it was seven degrees Celsius above what is normal for this time of the year.
The Indian Meteorological Department (IMD) officials said that it was unusual for temperatures to go so high in April since peak summer months in the northern plains were May and June.
The maximum temperatures were seven to eight degrees above normal, the officials said here.
Chandigarh recorded the maximum of 41.6 degrees Celsius while Ambala in Haryana saw a high of 42 degrees. Met department officials said heat wave conditions would prevail over the region in the coming days.