A street trader arranges fresh vegetables and fruit on a street in Pietermaritzburg
A street trader arranges fresh vegetables and fruit on a street in Pietermaritzburg, South Africa May 21, 2017. Reuters

Africa's central banks are walking a tightrope trying to curb inflation that is mostly out of their control and causing "horrifying" food insecurity, the International Monetary Fund's Africa head warned.

The IMF's twice-yearly Regional Economic Outlook released on Friday warned that 123 million people, or 12% of sub-Saharan Africa's population, face acute food insecurity - where the lack of access to adequate food puts someone's life or livelihood in immediate danger - by the end of the year.

That compares to around 82 million people affected before the COVID-19 pandemic, but the hammer blow of the virus, spillovers from the war in Ukraine as well as worsening unrest and drought in parts of the continent have seen the numbers spiral.

"What worries us really is the fact that this is coming on top of all of the dislocation caused by the pandemic," the IMF's Abebe Selassie told Reuters this week.

"I was in Chad (in May) and really the conditions that you saw there in terms of food security really are very, very horrifying."

Ethiopia, Somalia and parts of Kenya are also on track for a fifth failed rainy season, with famine looming in Somalia.

Annual food price inflation in sub-Saharan Africa has stood at over 10% since the second half of 2021 and the IMF's new economic forecasts this week revised up its regional inflation projection by 2 percentage points to 8.7% for this year.

It also cut the GDP growth forecast by 0.2 percentage points to 3.6%, a significant drop from the 4.7% expansion in 2021, and has said Nigeria, Ghana, Ethiopia, Malawi, and Zimbabwe may all need to raise interest rates faster or more decisively.

"It's a delicate balancing act that central banks face," Selassie said. "Inflation is this insidious, insidious tax on the poorest."

Rapidly rising global interest rates mean that sub-Saharan Africa's most heavily-indebted countries have effectively lost access to the international capital markets.

That has pushed countries including Ghana to request IMF bailouts and Selassie said work was still ongoing to determine if the West African country now needs debt relief.

Ethiopia, Zambia and Chad, meanwhile, had long been seeking to restructure their debts under the G20 Common Framework initiative established in 2020 in response to the COVID-19 pandemic.

Progress has been painfully slow. Ethiopia's restructuring has been delayed by ongoing civil war, although IMF managing director Kristalina Georgieva has said this week she hoped both Zambia and Chad's processes would now be finished by the end of the year.

Chad's bilateral creditors said late Thursday that the country now did not need debt relief, given the surge in the price of crude oil, one of the country's major revenue earners. Oil trading and mining firm Glencore, Chad's largest commercial creditor, declined to comment.

"Is everything working as timely, as speedily as we hoped? No," Selassie said, in an interview before the statement from Chad's creditors. "But I also want to stress that there's been quite a lot of cooperation from members of the G20, China and others."

He said Zambia and Chad's restructurings now rely on the private firms and funds that provided the country with loans and that the IMF had been "very frustrated" the required debt relief for Chad had not been finalised.

"Anything that exceeds what is a reasonable ask of the Zambians would be unfair to the people of Zambia," Selassie added.

He warned that more African countries might need to restructure their debt.

"If global conditions persist," he said, "There will be some countries that will require debt reprofiling."