Rivers Agency did 'utmost' during Derry flood
The Rivers Agency has said its officers did their utmost to prevent flooding in Londonderry on Tuesday.
Four homes in the Ballymagroarty area had to be evacuated and extensive damage was caused to Holy Family church because of a blocked culvert.
Philip Mehaffey from the Rivers Agency said he would devote whatever resources were necessary to try and solve the problem.
Heavy rain caused flooding in 28 locations in the city on Tuesday.
A landslide in Marlborough Terrace caused a 30-metre section of wall to collapse, crushing two cars.
Mr Mehaffey said the Rivers Agency was "not a blue-light service", but his staff would do what they could to help.
"Something that people must realise is that the capacity of infrastructure can be exceeded, or indeed the high flows will find weaknesses in systems and create blockages or other failures.
"You can never guarantee that flooding doesn't happen, but we will do our utmost."