Gavin Newsom has pleaded with Donald Trump for help in containing the Orange County chemical plant as officials warned there was still a risk of catastrophe. The California governor asked the president to issue a federal emergency declaration to bring in more support as the Garden Grove disaster continued into a fifth day. It comes as officials on Sunday revealed they had found a crack in the container that could be easing pressure in what they described as a “critically positive” moment. Meanwhile around 50,000 people have had their lives upended amid a mandatory evacuation zone in the immediate area,...