WHALE SWIMS 20 MILES IN RIVER -DEAD - FEAR FOR SPECIES : GRAY WHALE POPULATION HALF IN A DECADE

Siren here!  I believe the whales are starving and humans are the reason. 

I first heard this story via the Seattle Times:

BBC: Gray Whale Dies Days After Swimming River


Excerpt: The juvenile whale, affectionately dubbed "Willapa Willy" by locals, was first spotted last Wednesday in the north fork of the river, about 145 miles southwest of Seattle, the marine mammal research group said.

The whale, "although thin, was behaving normally," the group said at the time, with no sign of injuries.

Its teams had hoped the whale would find its own way out of the river but it failed to do so.