‘One-in-100-years’ flood talk disastrously misleading and should change, risk experts say

What does it mean when a natural disaster is described as a “one-in-50-years” or “one-in-100-years” event? Well, not what most people think and that has to change, according to a leading risk assessment expert.

Thomas Mortlock, from consultancy Risk Frontiers, said “100-year floods” don’t just happen once every 100 years.

In fact, 100-year floods have happened twice in a fortnight in the same place.

“In fact, it’s only about…