"We believe that approximately 6.5 million are reached with some level of assistance and that amount has increased very significantly since the beginning of the summer," the UN special representative for Somalia, James Swan, said Wednesday.
But, Swan added, "We are confronting a situation that for reasons of the continuing drought and an existing relatively fragile population... the risks remain severe."
Since January 2021, 1.1 million people in Somalia have left their homes in search of food and water, according to the United Nations.
The impoverished Horn of Africa nation is on the brink of a famine for the second time in just over a decade, with UN humanitarian chief Martin Griffiths stressing in September that time was running out to save lives.
The humanitarian response has intensified since then but some 7.8 million people or nearly half Somalia's population still need assistance, including 230,000 at serious risk of starvation, according to the UN.
UN High Commissioner for Refugees Filippo Grandi on Tuesday rallied international donors to keep their wallets open to fight the crisis.
But on Wednesday, the UN's World Food Programme (WFP) said only 46.7 percent of its $2.26 billion funding needs had been met.
"There are some hard to reach areas where we are, where we are going, also hard to reach populations -- minorities, displaced people, people with different abilities," said El-Khidir Daloum, WFP's country director in Somalia.
"The situation is dire."
The conflict-wracked nation is considered one of the most vulnerable to climate change but is particularly ill-equipped to cope with the crisis as it has for years battled a deadly Islamist insurgency.
Somalia was hit by a famine in 2011 which killed 260,000 people, more than half of them children under five.
In 2017, more than six million people in the country, more than half of them children, needed aid because of a prolonged drought across East Africa.
But early humanitarian action averted famine that year.