"But more importantly, only if a call is made by the Mozambican Government for urgent assistance", the organisation's founder, Imtiaz Sooliman, said.
At least 66 people have been killed and 141,000 affected after heavy rains deluged central and northern Mozambique, the government has said as it appealed for funds to manage the crisis.
At least 126 people have been killed in Mozambique, Malawi and South Africa as heavy rains hit southeastern Africa over the past week, affecting more than one million people, officials said.
A potentially disastrous cyclone is set to make landfall in the African country of Mozambique, most likely bringing a devastating storm surge and flooding to the nation's fourth-largest city.
Flooding from the storm's first round inundated almost 650 square miles, destroyed 18 hospitals, 938 classrooms and injured 122 people.
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In Malawi, the government declared a state of emergency after 56 people died and hundreds of thousands were displaced by flooding, the Evening Standard reported.
The MSD said Tropical Cyclone Idai is expected to take a north-westerly direction moving further inland and reaching some parts of the country. She had to be rescued by boat during the first round of flooding.
Cyclone Idai is expected to produce winds of up too 200-kilometres an hour.
Before the storm formed over the Mozambique Channel this week, it was a disturbance that settled over the region and unleashed torrential rains the flooded much of the two neighboring countries.
"It [Idai] is on its way to Beira, it's going to make landfall tonight", South African Weather Service forecaster Jan Vermeulen told News24 on Thursday. The cyclone was located over the Mozambique Channel on 12 March and is expected to strengthen into intense tropical cyclone status (Category 4 equivalent) again prior to making landfall.