Authorities say this number is likely to rise further given that some states with water shortages have not yet submitted status reports.
India is heavily dependant on monsoon rains, which have been poor for two years in a row.
The drought is taking place as a heat wave extends across much of India with temperatures exceeding 40C for several days now.
Schools have been shut in the eastern state of Orissa and more than 100 deaths due to heat stroke have been reported from across the country, including from the southern states of Telangana and Andhra Pradesh which saw more than 2,000 deaths last summer.
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