About 10.1 million Ethiopians — most of them children — will face “critical food shortages,” next year as the country grapples with its worst drought in half a century, Save the Children reports.

The international children’s advocacy group said in a news release this week that Ethiopia is currently experiencing its most devastating drought in 50 years, with the El Nino weather pattern to blame. The phenomenon occurs when a part of the Pacific Ocean is warmer than usual and has a far-reaching ripple effect that brings atypical weather throughout the world.

According to Save the Children, this year was the first time since 1989 that seasonal rains did not arrive in Ethiopia. With more than 80 percent of the country relying on that rainfall to produce the agricultural products they consume, many residents were at risk of going hungry.

The organization reports that 5.75 million Ethiopian children face food shortages, and 400,000 of them are at risk of severe malnutrition. The country’s population is about 95 million people, so data suggest more than 1 in 10 Ethiopians are at risk of the “critical food shortages” in 2016.

Save the Children reports northern and western Somalia are also affected by the drought, and some families in that country were venturing hundreds of miles as they tried to find water.

It’s expected that the emergency response to the drought will cost $1.4 billion, according to Save the Children. The Ethiopian government has already promised $192 million for relief efforts, though Save the Children said in a statement that additional assistance is “urgently needed.”

A United Nations group has warned this year’s El Nino is looking to be one of the three strongest in the past 65 years and may interact with climate change to create unprecedented effects.