Belatedly, the city government is looking at a range of new flood defences, including dykes.
ECONOMIST: The threat grows from rising water and sinking buildings
Jimmy Lee Dykes, 65, killed a bus driver and kidnapped a 5-year-old boy in Alabama.
Mr Dykes is holding the youngster at his remote home inside an underground bunker, police said.
"The vet said he was very lucky, " said Ms Rees-Dykes, an equestrian centre worker.
The U.S. Navy confirmed Monday that Dykes served in the military from 1964 to 1969.
Authorities have said little about what, if any, demands have been made by Dykes.
Jimmy Davis swore out a complaint related to the incident against Dykes in December.
They do not know Dykes, according to Clouse, who has been speaking with the family.
On Thursday, dozens of law enforcement vehicles clogged the dead-end dirt road that leads to Dykes' house.
CNN: Questions swirl as man holds boy in Ala. underground bunker
Dykes abducted the boy, named Ethan, last Tuesday after shooting dead the driver of his school bus.
Dykes told Creel that the built-in ceiling protected against the possibility of wet ground above, Creel said.
Dykes has allowed "comfort items" to be delivered, such as potato chips and toys, the statement said.
Olson also said Dykes has allowed police to deliver coloring books, medication and toys for the boy.
Town clerk Linda Dykes said the previous arms were thought to have been in continuous use since 1968.
Dykes "got mad about what he saw" and stopped their truck to complain as they returned, she said.
The 65-year-old Dykes was friendly and welcoming, and said the hole was being dug as a storm shelter.
In the rich world, some of the more obvious measures will include building bigger dykes and flood defences.
Ms Rees-Dykes described the nine-year-old as a character and mischievous who has tried previously to get through fencing.
Witnesses said Dykes, who knew Poland personally, fired four shots, killing him, and took the five-year-old at random.
"From the very beginning, I had already forgiven Mr. Dykes even though he had my child, " she said.
Police used it to communicate with Dykes along with the telephone inside the bunker and the hatch door.
According to the FBI, bomb technicians scouring the Dykes property in southeastern Alabama found the two explosive devices.
Dykes then took one 5-year-old boy, bringing him to the handmade bunker he had created near his home.
Matt Dykes, a policy officer from the TUC, says more needs to be done to stop graduates being exploited.
Neighbour Patricia Smith said her children, who were on the bus, had run into Mr Dykes several months ago.
County Coroner Woodrow Hilboldt said Mr Dykes was believed to be hiding in something similar to a tornado bunker.
Dykes has been described as a self-styled survivalist with "anti-government" views, according to the Southern Poverty Law Center's Hatewatch.
She thinks Dykes had a soft spot for Ethan because he has disabilities.
And officials said there was no indication that Dykes had harmed the boy.
It is unclear if Dykes has access to news reports about the standoff.
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