The drainage system around Bridge Road is set to be improved to prevent another major flood.
Two years ago dozens of homes were hit when a drainage channel that carries surface water into the nearby Mill Pond overflowed. The EA is now throwing its resources into solving the problem over the next two years.
Options include making the culvert bigger and installing different screens along the drainage channel to stop it getting clogged up with rubbish.
It comes as the EA announced a massive funding drive across the country – with 60 schemes shortlisted for construction works, with a total of £1.3m being spent in Portsmouth to protect 2,200 homes.
Residents in Emsworth reacted with delight.
Chris Clode, chairman of Emsworth Flood Action Group, said: ‘We’re delighted by the fact that through the efforts of the flood action group and the support of the national flood forum that the EA has now agreed to put in measures to alleviate the flooding in Bridge Road and other areas of Emsworth.
‘It means everything that we’ve done over the past year or so is worthwhile.
‘It caused a lot of damage and distress.
‘These sort of flood reduction measures I’m sure will alleviate the problem.’
The work in Portsmouth will involve building underground storage tanks in the area around Copnor Road, as well as near South Parade Pier. It will means sewers are not overwhelmed when there is heavy rainfall and less surface water accumulates.
As well as funding for construction works this year, the EA is giving the city council £300,000 to come up with designs for improving coastal defences near Southsea Common and the north east of Portsea Island, around Eastern Road.
Portsmouth North MP Penny Mordaunt said: ‘It’s good news we have some money coming through to shore up these defences.’