Mozambique's President Daniel Chapo delivers a speech during the sixth Portugal-Mozambique Bilateral Summit in Porto, Portugal, 09 December 2025. EPA/ESTELA SILVA 
Chapo wrote in a post on Facebook late on Sunday that Mozambique "is going through a tough time ... (and) the absolute priority at this moment is to save lives".
Heavy rains since mid-December have caused widespread floods in Mozambique's Gaza, Maputo and Sofala provinces, with several river basins above alert levels, the United Nations Office for the Coordination of Humanitarian Affairs said in a report on Sunday.
The OCHA report said authorities estimated that more than 400,000 people had been affected, with numbers expected to rise as rains continue.
Neighbouring South Africa has deployed an air force helicopter to Mozambique to help with search-and-rescue efforts.
Heavy rains have also affected parts of South Africa, including the northeast where its renowned Kruger National Park is located. On Monday Kruger reopened to day visitors after being closed for several days.
Flooding has become more frequent and severe in southeastern Africa as climate change makes storms in the adjacent Indian Ocean more powerful.
(Reporting by Custodio Cossa; Additional reporting by Wendell Roelf in Cape Town; Writing by Alexander Winning; Editing by Michael Perry)