Authorities say the death toll in Mozambique from last month’s cyclone has risen to 598 while humanitarian workers race to contain a cholera outbreak in the storm’s wake.

The World Health Organization says at least 1,052 cholera cases have been reported by Mozambique’s health ministry, including one death.

The acute diarrheal disease has been spreading in the hard-hit city of Beira and its half-million residents since the outbreak was declared last week.

Children play at a watering point in Beira, Mozambique, Monday April, 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)
Children play at a watering point in Beira, Mozambique, Monday April, 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)

Some 900,000 oral cholera vaccines have arrived in Beira for the launch of a vaccination campaign later this week. Scores of thousands of people in the region have no access to clean water and cholera cases are now reported outside Beira.

Cyclone Idai also killed at least 259 people in neighboring Zimbabwe and at least 56 in Malawi.

A mother carries her baby on the streets of Beira in Mozambique, Monday April 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)
A mother carries her baby on the streets of Beira in Mozambique, Monday April 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)
Children play at a watering point in Beira, Mozambique, Monday April, 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)
Children play at a watering point in Beira, Mozambique, Monday April, 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)
A father cuddles his daughter in Beira, Mozambique, Monday April 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)
A father cuddles his daughter in Beira, Mozambique, Monday April 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)
People at a watering point in Beira, Mozambique, Monday April, 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)
People at a watering point in Beira, Mozambique, Monday April, 1, 2019. The death toll from the cyclone has reached over 500, as Mozambican and international health workers raced on Monday to contain the outbreak of cholera in the cyclone-hit city of Beira and surrounding areas, where cases of the disease has jumped to more than 1,000. (AP Photo/Tsvangirayi Mukwazhi)
Members of the US army help load supplies at Beira International airport, Mozambique, Monday, April 1, 2019,  joining the humanitarian aid efforts following a cyclone that hit the country on March 14. (AP Photo/Tsvangirayi Mukwazhi)
Members of the US army help load supplies at Beira International airport, Mozambique, Monday, April 1, 2019, joining the humanitarian aid efforts following a cyclone that hit the country on March 14. (AP Photo/Tsvangirayi Mukwazhi)