Marshall Islands, low-lying US ally and nuclear testing site, declares a climate crisis

Bleached coral is exposed to the hot sun during low tide in August 2018 in Bikini Atoll. (Carolyn Cole/Los Angeles Times/TNS)

The Marshall Islands, a low-lying chain of atolls and key U.S. ally in the Central Pacific, has declared a national climate crisis because of the mounting risk of sea-level rise, the nation’s president announced this week.