Why it matters: Melting glaciers contribute to rising sea levels, can lead to disastrous floods and alter river ecosystems. On top of that, glaciers feed rivers, which in turn provide water for cities and farmers. Flows will eventually decline, affecting hundreds of millions of people in countries like India, Pakistan and China.

Here’s what else is happening

Kenya: The death toll in a terrorist attack by Shabab militants rose to 21 people, Kenya’s president said. All the assailants who stormed a luxury hotel and office complex in Nairobi had been “eliminated,” he added, but the country remained on the highest alert.

Trump and Putin: Since 2016, President Trump has had at least five face-to-face meetings with President Vladimir Putin of Russia. What they said to each other is a mystery — one now drawing fresh scrutiny from Mr. Trump’s critics.

China: A Canadian man sentenced to death by a Chinese court for smuggling drugs intends to appeal, one of his lawyers said. The move could buy time while Canada seeks to secure his clemency, but comes amid a widening diplomatic rift between the two countries.

Afghanistan: New leadership in Kabul has been working to restore order and crack down on crime, bringing a rare sense of hope to the capital city.