The Union of Concerned Scientists (UCS) has been tracking the alerts sent by the National Weather Service warning about dangerous weather. Half of the US population has faced an extreme weather alert since 1 May and many more are likely to face risks from wildfires, flooding, tropical storms and extreme heat as summer begins. Half of Americans have faced ‘extreme’ weather in the last six weeksĪ man cools off near a fountain during a heatwave in Houston, Texas, when temperatures reached 98F (37C). What is the latest on the rescue operation? Follow the news here. The oxygen supply in the vessel depends largely on a range of factors, according to experts, such as the breathing rate of those onboard, their level of physical activity and whether they remain calm. Is there still any oxygen left in the submarine? It is hard to know.

What I can tell you is we’re searching where the noises are, and that’s all we can do at this point,” Frederick said, adding that recordings were being analysed by navy subsurface acoustics experts. The search is focused on an area where underwater sounds have been heard but their origin remains a mystery. “We have to retain hope as part of what we are doing as a human community to find the explorers and bring them to safety,” she said. A US Coast Guard captain, Jamie Frederick, said on Wednesday: “When you’re in the middle of a search and rescue case, you always have hope.” Joyce Murray, Canada’s coastguard minister, echoed that sentiment. Officials still hold out hope of a rescue. Equipment from the US, Canada, UK and France is heading to the scene of the search, about 400 miles (640km) south of St John’s, Newfoundland, joining an international coalition of rescue teams that is sweeping a vast expanse of the North Atlantic for the Titan after it went missing on Sunday, nearly two hours into its dive.

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