Excessive heat and early summer in South Asia's Pakistan, India, Bangladesh, and several African countries like Malawi and Nigeria are being blamed by experts for spreading infectious diseases like cholera.
There are also increasing numbers of cholera and acute watery diarrhoea infections because people drink polluted water due to drought-like circumstances and an unsanitary atmosphere.
A separate unit for confirmed and suspected cholera cases has been set up in Karachi's tertiary-care institutions following the advice of the WHO Pakistan.
Aside from coordinating with other agencies, the DHOs have been tasked with ensuring that the personnel and the community receive ongoing health education and access to clean drinking water, toilets, and food. They've also been told to make sure that pharmaceuticals are readily available and to set up command centers in medical facilities.
Residents of Karachi were also urged to get chlorinated water from the city's Water and Sewerage Board (KWSB).
Also, 100,000 water-purifying tablets were delivered by the World Health Organisation (WHO) national representative to Karachi's health authorities for distribution to residents in the impacted districts. He said the World Health Organisation (WHO) will supply 100,000 more chlorine tablets in the days. There are 5 litres of water on each tablet, officials say. Officials also contacted Dr Jumman and requested that Karachi and other Sindh cities' cholera detection labs be strengthened.