Roads were blocked and train services cancelled after 24-hours of heavy rain.
Transport links were badly affected today with massive disruption and delays in and out of Glasgow's Queen Street Station.
And there were fears Pollok Park and the adjacent M77 could flood.
Around 53mm of rain fell in Glasgow in just 24-hours – almost half the monthly average for August.
Met Office forecaster Peter Sloss said: "This has been one of the wettest 24 hours on record."
"It is a very slow moving weather front which means we are seeing prolonged wet weather.
"It will remain unsettled and persistent and while there will be more heavy rain tomorrow, it won't last as long."
Millport, on the Isle of Cumbrae was the wettest place in Scotland with 74mm of rain in just 36 hours.
As the rain continues it is feared the White Cart, near Pollok Park, may flood in the next few hours, threatening nearby Haggs Castle Golf Club and the M77.
The rain has also caused major disruptions on the railways, with the Glasgow to Edinburgh route cut to a half hourly service.
Other services are subject to disruption. Queen Street services are suspended to and from Anniesland, Cumbernauld, Falkirk Grahamston and Dunblane.
Glasgow Central and Mount Florida services are also subject to disruption.
A replacement bus service is running between West Kilbride and Largs due to flooding at Fairlie.
A ScotRail spokeswoman said: "We are running as robust a service as possible."
ScotRail said the situation was constantly changing and advised travellers to check online before setting off.
In Glasgow, flooding closed Maryhill Road at the Acre Road junction, and a flood warning was also issued in Carmyle.
There were further problems with the A749 London Road closed in both directions between Binnie Place and Monteith Place due to an earlier burst water main.
Meanwhile, Balmore Road in Possil, was just passable both ways between Skirsa Street and Blackhill Road.
And in the East End Gartocher Road, in Shettleston, closed in both directions between Gartocher Terrace and the Gartocher Drive because of flooding.
As well as Pollok Park a further flooding warning was issued for the Carmyle area in the east of Glasgow.
Areas at risk includes; Orchard Park area along River Road, Ardargie Drive, and the south section of Carmyle Avenue.
On the roads problems were reported in Argyll and Bute and Ayrshire.
The A816 in Lochgilphead closed in both directions between the A83 junction and the B841 junction, because of flooding.
There was also flooding on the Beith to Lugton road in Ayrshire.
The A723 in Carfin, Lanarkshire, was closed in both directions at Loanhead Road .
Elsewhere in Scotland, Tayside Police said river levels were very high in the force area but there were no reports of significant flooding this morning.
But officers said drivers should take extra care on the roads due to excess surface water.
The Scottish Environment Protection Agency warned that flooding is likely in Aberdeenshire, parts of Inverness-shire and many other areas.