Torrential early week rain has triggered flooding in western Great Britain and on the island of Ireland.

Flooding targeted parts of southwestern England, Wales and Northern Ireland together with the Republic of Ireland, following rainfall of 50 to 100 mm (2-4 inches) within 24 to 48 hours.

In Cornwall, southwestern England, a search was carried out for a girl who went missing on Monday, the BBC said in a report on Tuesday.

Sewage spilled into the streets of Par, Cornwall, during the height of the flooding, according to the BBC. In neighboring Devon, several roads in Torbay were shut, and the seafront in the area was closed to traffic. Strong onshore winds were apparently sending large waves and a storm tide against the coast.

Pembrokeshire, Carmarthenshire and Swansea were the hardest-hit counties of Wales. Roads near Milford Haven were “totally submerged” in places, the BBC said.

In Northern Ireland, 18 people had to be rescued by boat in County Tyrone amid numerous instances of flooding. Parts of Belfast were among areas hit hard by flooding. River flooding trapped some residents of Beragh in their homes.

Meanwhile, eastern areas of the Irish Republic were doused with torrential rain, resulting in flooding of major roads, houses and one of Dublin’s main shopping centers, according to the BBC. An off-duty police officer was said to be missing in County Wicklow, near a flooding river.

Weather information accessed by AccuWeather.com shows that the flooding resulted from a stream of heavy rain-bearing cloud being directed across a relatively narrow swathe of the British Archipelago. A “blocking high” east of the instigating storm caused its train of downpours to repeatedly cross the same areas, rather than progressing eastward as would be more typical.