"A trio of potentially dangerous storms swirled over the Atlantic Ocean on Tuesday, as Tropical Storm Karl formed in the Caribbean on a path that could take it over oil-production facilities in Mexico's Bay of Campeche."

"Most levees in the city of Sacramento have technically failed a maintenance inspection by the U.S. Army Corps of Engineers because they are bristling with trees and other structural intrusions. But the city won't be penalized — for now — while long-term solutions are being developed."

"The tragic explosion of a gas pipeline  in a San Francisco suburb has shed light on a problem usually kept underground: Communities have expanded over pipes built decades earlier when no one lived there. Utilities have been under pressure for years to better inspect and replace aging gas pipes — many of them laid years before sprawling communities were erected around them — that now are at risk of leaking or erupting."

"Scientists in the Arctic are reporting a rare mass migration of thousands of walrus from the ice floes to dry land along Alaska's coast."