Met Office issues further rain warning
A Met Office warning for rain and snow is in place for large parts of west central Scotland.
The flood forecasting and river management agency Sepa has issued flood warnings for for Caithness and Sutherland, and Aberdeen city and Aberdeenshire.
Warnings are also in place for Tayside, Ayrshire and the Scottish Borders.
The weather has caused disruption to train services in western and northern parts of the country.
ScotRail said a damaged bridge is to blame for problems with services between Glasgow and Stranrarer, with Ayrshire trains also affected.
The Glasgow-East Kilbride route is disrupted by flooding, as are trains from Glasgow/Edinburgh to Inverness.
Wick and Inverness services may be cancelled, due to flooding between Wick and Forsinard.
The Met Office has also issued a warning of wind affecting the north of Scotland, the Western Isles and the Northern Isles.
It said: "Severe gales from the east or northeast will develop across northern Scotland during Sunday, with gusts of 60 to 70 mph expected in some exposed sites.
"The core of strongest winds initially develops across Orkney and Caithness before transferring to northern parts of the Hebrides by afternoon.
"Conditions will be worsened by persistent rain and hill snow, with some snow accumulations to low levels across Shetland, although Shetland will not see the strongest winds."
In Orkney, storm damage has undermined the access road to the Eday pier.
Meanwhile, Network Rail Scotland has said that water levels are rising at the Lamington Viaduct in South Lanarkshire.
Engineers have reinforced the dam at the site to allow them to continue working on the structure, which carries the West Coast Main Line.
It has been closed since Hogmanay, when a swollen River Clyde caused damage to the pier supporting the viaduct.