The death toll from historic flooding in eastern Colorado stands at four and will likely increase, authorities said, as rescuers struggled to reach hundreds of people stranded or displaced by fierce floodwaters.
At least four people are confirmed dead after six days of rain that flooded an area nearly the size of Devon and destroyed 1,500 homes, according to Colorado's Office of Emergency Management officials.
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Some children, particularly those who have been more directly affected, may show symptoms of stress and trauma.
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The threat level has been raised to critical by MI5's Counter-Terrorism Analysis Centre.