People in Florida have been told to prepare for the largest evacuation effort for years as a new hurricane heads for the Gulf Coast, which is still reeling from another historic storm.<br /> <br />Hurricane Milton, off the Mexican coast, could threaten lives when it reaches the state's west coast in the middle of the week, the National Hurricane Centre (NHC) says.<br /> <br />It comes just 10 days after Storm Helene - the deadliest mainland storm since Katrina in 2005 - tore through the US south-east, killing at least 225 people.<br /> <br />Hundreds of others are still missing.<br /> <br />At least 14 of those deaths were in Florida, where 51 of 67 counties are now under emergency warnings as Milton approaches.
