"While they are still alive and in water, there is certainly hope for them, but as time goes on, they become more fatigued and their chance of survival reduces," said a government wildlife official.
New York has awarded two contracts for large offshore wind farms, with more anticipated. Researchers are surveying whales in the area to craft strategies to mitigate dangers to them and their habitat.
Members of the Utqiagvik community captured almost 20 bowhead whales last year. Families divide the meat and eat it all winter. This year, the whales haven't shown up, amid record warm temperatures.
Waters off the coast of Maine are warming faster than 99 percent of the world's oceans. That's forcing whales northward in pursuit of prey, threatening some of their already dwindling populations.
Washington's orcas are hungry, because there aren't enough salmon for them to eat. State officials want to take out some dams to help them, but that would hurt Washington's wheat farmers.
Parliament passed the Ending the Captivity of Whales and Dolphins Act in a move hailed by animal rights activists. Violations are punishable by fines of up to about US$150,000.
More than 60 dead gray whales have washed up on Pacific coasts this year, the most in two decades. Researchers are trying to determine whether their food source is a problem, or climate change.