Four flood warnings have been issued for parts of England and Wales on Sunday, while there are 17 flood warnings in place in Scotland.
High rainfall totals have been recorded in the Scottish Highlands, peaking in Cluanie Inn which received 130mm.
Scottish government ministers and officials gathered on Sunday afternoon to discuss the impact of Storm Boelo.
In a statement, the Scottish government said while conditions may ease later on Sunday, there is potential for adverse weather to return in the coming days.
Police in Scotland have warned against unnecessary road journeys and ferry services have been cancelled.
Some flights to and from Belfast, Glasgow, Aberdeen and Dublin airports have been cancelled and train services across the UK have faced disruption.
Jason Kelly, the Met Office’s chief forecaster, said: “People should prepare for the potential for disruption, particularly to travel and power supplies. Secure loose items outside, plan ahead if you are travelling and keep up to date with the latest forecast and warnings for your area.”
Events across the country planned for the weekend have been cancelled due to the weather.
In Merseyside, a River of Light event was called off for the second day in a row, and Knowsley Safari Park has announced that it was closed on Sunday due to “high winds”.
Several markets across the North West have also been cancelled due to the weather, including Quayside Makers Market in Salford and Macclesfield Treacle Market in Cheshire.
In the East Midlands, Worksop Half Marathon was called off, and closures were announced at Wollaton Hall and Deer Park, Robin Hood’s Wheelgate Park and Twinlakes Theme Park.
