A swimmer was missing off the coast of Western Australia on Saturday after what authorities said was an attack by possibly two sharks and "heroic" attempts by witnesses to help many others out of the water.
Four migrants, three of them children, drowned on Tuesday after a boat in which they and 23 others were trying to cross from Turkey to Greece sank, the Greek coast guard said.
Bad weather off Canada's Pacific Coast on Monday prevented a salvage crew from boarding a cargo ship where several containers of chemicals burned over the weekend, the coast guard said.
A fire broke out on Saturday on containers on a cargo ship carrying mining chemicals off British Columbia, and the Canadian Coast Guard said it is working with the U.S. Coast Guard to assess the situation, including environmental hazards.
Two Yanomami children drowned in a river on their reservation where illegal gold miners operate a dredger, an indigenous leader said on Thursday, alleging the boys were sucked into the machine as they bathed.