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Photo: Tony Karumba/AFP via Getty Images

In East Africa, the Middle East and South Asia, traveling locust swarms the size of Manhattan are putting potentially hundreds of millions at risk of starvation in what the UN has called the worst outbreak in a quarter of a century.

What it means: "Millions will starve because clouds of approximately 80 million desert locusts per square kilometer are voracious," writes Robert Rotberg, founding director of the Harvard Kennedy School’s Program on Intrastate Conflict.

  • "In one day they consume wheat, barley, sorghum, or maize crops that feed 35,000 people. Masses the size of cities can consume 1.8 million metric tons of vegetation every day – enough to feed 81 million people."
  • "The United Nations is to test drones equipped with mapping sensors and atomizers to spray pesticides in parts of east Africa battling an invasion of desert locusts that are ravaging crops and exacerbating a hunger crisis."

What's happening: The outbreak had been mostly confined to Kenya, Ethiopia and Somalia initially, but the UN Food and Agriculture Organization (FAO) says it’s now tracking 15 countries in Africa, the Middle East and South Asia affected by the locusts, Scientific American reports.

  • "The swarms have appeared in a swath hundreds of miles wide, from South Sudan in the west to parts of Pakistan in the east."

What's next: Authorities in East Africa are already undertaking a coordinated campaign of aerial pesticide spraying, "but experts say the scale of the infestation is beyond local capacity as desert locusts can travel up to 150 km (95 miles) in a day," the World Economic Forum notes.

  • This threatens to increase food shortages in a region where up to 25 million people are reeling from three consecutive years of droughts and floods.

Go deeper

Thousands without power as "hazardous" winter storm lashes East Coast

Winter view from Charlotte as winter storm Izzy creates dangerous conditions in Charlotte, N.C. on Jan. 16. Photo: Peter Zay/Anadolu Agency via Getty Images

A major winter storm was lashing much of the East Coast on Sunday, causing widespread power outages and disrupting travel over the holiday weekend.

The big picture: Heavy snow and ice accumulations are "likely to produce hazardous travel," downed trees and more power outages from the Mid-South to the Northeast, per the National Weather Service. Some parts of the U.S. can expect to see up to a foot of snow through Monday.

Updated 3 hours ago - Science

Volcanic eruption in Tonga caused "significant" damage

This satellite image of the eruption on Jan. 15 taken by Himawari-8, a Japanese weather satellite operated by Japan Meteorological Agency and released by National Institute of Information and Communications Technology (NICT). Photo: NICT via AP

Significant damage has been reported in Tonga following an undersea volcanic eruption on Saturday, which covered the Pacific nation in ash and cut off communication lines.

Driving the news: The eruption triggered tsunami warnings across Tonga's islands and in other regions, including the West Coast of the U.S. and New Zealand.

3 hours ago - World

North Korea launches 4th suspected missile test this month

A news broadcast in Seoul, South Korea, of an apparent North Korean missile test on Monday morning local time. Photo: Jung Yeon-je/AFP via Getty Images

North Korea's military fired "two suspected short-range ballistic missiles" eastward from Pyongyang on Monday morning local time, per South Korean and Japanese officials.

Why it matters: The fourth such launch since Jan. 5 comes days after North Korea's military warned of "stronger" action if the U.S. moved to have more sanctions imposed on the country.