Mozambican authorities have announced the first cholera death among cyclone survivors in the hard-hit city of Beira as the number of cases rises to 517.

Broadcaster TVM on Sunday night cited national health official Ussene Isse for the new toll.

Cases of the acute diarrheal disease have risen dramatically since the outbreak was declared on Wednesday. Cyclone Idai severely damaged the water system for Beira, a city of 500,000, when it hit on March 14.

Women and men pick up bricks from a collapsed house to build another structure in Beira, Mozambique, Sunday, March, 31, 2019. (AP Photo/Tsvangirayi Mukwazhi)
Women and men pick up bricks from a collapsed house to build another structure in Beira, Mozambique, Sunday, March, 31, 2019. (AP Photo/Tsvangirayi Mukwazhi)

The World Health Organization has said some 900,000 cholera vaccine doses are set to arrive on Monday.

Cholera is an acute diarrheal disease that is spread by contaminated water and food. It can kill within hours but is relatively easy to treat.

The overall cyclone death toll in Mozambique is now 518.

A woman fetches water from an unprotected source in Beira, Mozambique, Sunday, March, 31, 2019. Cholera cases among cyclone survivors in Mozambique have jumped to 271, authorities said. (AP Photo/Tsvangirayi Mukwazhi)
A woman fetches water from an unprotected source in Beira, Mozambique, Sunday, March, 31, 2019. Cholera cases among cyclone survivors in Mozambique have jumped to 271, authorities said. (AP Photo/Tsvangirayi Mukwazhi)
Chinese doctors spray chemicals to prevent the spread of cholera at a camp for displaced survivors of Cyclone Idai in Beira, Mozambique, Sunday, March, 31, 2019. (AP Photo/Tsvangirayi Mukwazhi)
Chinese doctors spray chemicals to prevent the spread of cholera at a camp for displaced survivors of Cyclone Idai in Beira, Mozambique, Sunday, March, 31, 2019. (AP Photo/Tsvangirayi Mukwazhi)
Women and children are outside a displacement camp in Beira, Mozambique, Sunday, March, 31, 2019. Mozambican authorities say the number of cholera cases among cyclone survivors has risen to 271. (AP Photo/Tsvangirayi Mukwazhi)
Women and children are outside a displacement camp in Beira, Mozambique, Sunday, March, 31, 2019. Mozambican authorities say the number of cholera cases among cyclone survivors has risen to 271. (AP Photo/Tsvangirayi Mukwazhi)
A young boy is seen outside a displacement camp for survivors of Cyclone Idai in Beira, Mozambique, Sunday, March, 31, 2019. (AP Photo/Tsvangirayi Mukwazhi)
A young boy is seen outside a displacement camp for survivors of Cyclone Idai in Beira, Mozambique, Sunday, March, 31, 2019. (AP Photo/Tsvangirayi Mukwazhi)

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