Drivers have been asked to take extra care on wet roads amid 13 flood alerts and warnings across the country.
A yellow weather warning that ended at 6am Tuesday saw surface water signs deployed on roads in Glasgow, particularly on the M77, as heavy rain is expected to continue.
Bus services and train lines are also expected to face disruption.
Sudden downpours were forecast to bring up to 70mm of rain in some places from Monday into Tuesday – with 25mm falling in most areas.
Network Rail said that with “exceptionally heavy rainfall” expected across parts of Scotland, it has additional staff on standby.
It comes as SEPA issued flood alerts across central, north and west Scotland, and flood warnings across the Highlands on Tuesday.
Flood alerts are in place across the whole of Scotland with more serious warnings issued for areas of Tayside – in Glen Lyon and Innerpeffray to Bridge of Earn.