The study was carried out by Nasa’s Sea Level Change Science Team based at the University of Hawaii.
Assistant professor Phil Thompson, lead author of the report, said: “It’s the accumulated effect [of the floods] over time that will have an impact.
“If it floods 10 or 15 times a month, a business can’t keep operating with its parking lot under water. People lose their jobs because they can’t get to work. Seeping cesspools become a public health issue.”
According to the United Nations by 2050 coastal cities will see hundreds of millions of people at risk from floods made worse by rising seas.
Ben Hamlington, leader of Nasa’s Sea Level Change Team, said urban planners should prepare for the increase in high-tide floods as well as extreme weather events.
He said: “From a planning perspective it’s important to know when we’ll see an increase.
“Understanding that all your events are clustered in a particular month, or you might have more severe flooding in the second half of a year than the first, that’s useful information.”