The heat wave has hit the western state of Rajasthan, the northern state of Uttarakhand and at least a dozen other states, the India Meteorological Department said.
Authorities have confirmed at least 18 people died from heat stroke in the eastern state of Orissa, according to Manoranjan Choudhary, an official at the state revenue department, which monitors heat-related deaths. Thirty-six other suspected heat wave deaths are being investigated, he added.
The meteorological department said the sweltering conditions are likely to continue for at least two more days.
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