Scientists and disaster response researchers said Nepal’s early flood warning system relied on a conventional network of river gauges in this remote region.

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Artists, scholars and fans celebrated Ms. Kusama as a cultural giant who helped bring Japanese art to the masses.

© Noriko Hayashi for The New York Times

Survivors described the terrifying speed and power of the “boulders, sand and thick sludge” that killed hundreds and wiped out villages on the border between Nepal and Tibet.

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An ice avalanche that started high in the Himalayas tumbled thousands of feet, releasing vast amounts of energy that pulverized the ice into a significant volume of flood water.

© Navesh Chitrakar/Reuters

Relatives of a family killed by a semi truck say they were not consulted about the ad, which connected the crash to illegal immigration.