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Hot as Hell: What's causing the record-shattering heatwave in the US and Canada?
California officials seek help from federal government for salmon fishers facing ban
Heavy snow, rain hits Southern California; major roads closed due to blizzard
Whitewashed: Gigantic winter storm brings blizzard and cold to the US
Underwater annihilation: Purple sea urchin swarm wreaks havoc along US West Coast
The explosion of sea urchins is the latest symptom of a marine ecosystem that’s out of whack in the Pacific Northwest.