This was revealed at the last working session of the Council of Ministers, whose results are disclosed on Wednesday by the Granma daily.
The INRH executive said that Havana, Ciego de Avila and Sancti Spiritus reported the lowest provincial rainfall, with less than 30 percent.
The low levels of rainfall caused the increase in areas affected by drought, he added.
In late November 2020, 13 percent of the municipalities in the country were affected by scarce rainfalls, and in late March 2021, this figure rose to 45 percent.
Some 552,852 people nationwide are affected by the impact of drought.
The provinces of Havana, Artemisa, Santiago de Cuba, Camagüey and Guantanamo account for 81 percent of the total.
Antonio Rodriguez stated that in order to alleviate this situation, actions in pipelines and networks, interconnections of systems, more pumping stations, and drilling of wells are being carried out to improve water services for more than 700,000 inhabitants.