One week after the record deluge in Texas, the biggest hurricane ever measured in the mid-Atlantic is tearing through the Caribbean. Hurricane Irma, a category-five storm, is destroying homes and threatening lives in the Leeward Islands with 185mph winds and 11ft coastal surges, and in the coming days it is forecast to hit Puerto Rico, Haiti, Dominican Republic, Cuba and Florida. The governor of Florida has already declared a state of emergency.

For Donald Trump, these twin megastorms are a source of awe. “Hurricane looks like largest ever recorded in the Atlantic!” he tweeted of Irma on Wednesday. “Even experts have said they’ve never seen one like this!” he posted of Harvey last week. But for many scientists they are a worrying sign of a “new normal” in which extreme weather events become more intense as a result of manmade climate change. Rather than expressing astonishment, they say policymakers need to strengthen long-term countermeasures and act more effectively on reducing carbon emissions.(theguardian)…[+]