(CNN) Cyclone Idai may have killed more than 1,000 people in Mozambique, President Filipe Nyusi said in an address on national radio Monday.

"Officially, we have a record of more than 84 dead but everything indicates that we can have a record of more than 1,000 dead," Nyusi said, adding that "100,000 people are in danger."

Nyusi was speaking after taking a flight over affected areas to view the destruction and rescue efforts.

He called the situation a "real humanitarian disaster of large proportions."

"Waters from the rivers Pungue and Buzi have broken their banks, wiping out entire villages, isolating communities and we could see, as we flew above, bodies floating," the President said.

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