Rain causes rise in flood risk in Scotland
Flood watches and warnings have been put in place on most of Scotland's rivers.
According to the Sepa website, 26 flood watches and warnings were in place, five of them classified as severe.
Central Scotland Police said flooding was affecting many roads and urged drivers to take care.
Tayside Fire and Rescue said it had dealt with dozens of calls about flooding in Perthshire - with Bridge of Earn one of the worst affected areas.
Sepa's said waters were rising at the rivers Tay, Earn, Tummel and Isla, and advised: "This means that severe flooding is expected for the area, affecting many homes and businesses, main roads and large areas of land.
"There is a serious danger to life and property. Act now to protect yourself, your family and your home or business."
Perth and Kinross Council said properties were affected by water in areas including Aberuthven, Bankfoot, Glenfarg and Perth.
The council advised householders to place sandbags or earth-filled pillowcases across doorways.
The authority added: "A number of sandbags and aqua sacks have also been provided, however supplies are limited and resources are currently stretched as there has been a very high demand yesterday and overnight.
"In addition, a wide range of equipment is being used to pump water, unblock pipes and to remove water from properties."
The council advised against travel unless the journey was "absolutely necessary".
A number of roads were badly affected including sections of the A81.
The A9 between Greencornhill roundabout and Plean was only passable with care.
The A84 between Callander and Lochearnhead was flooding at the south end of Loch Luibnaig, and drivers were advised to avoid the route.
The Scottish government said its resilience room was active and was monitoring the situation.
A spokesman said they were liaising closely with Sepa, the Met Office, Transport Scotland, emergency services and relevant local authorities.
Finance Secretary John Swinney tweeted late on Saturday evening saying: "Just had flood update from police. All agencies working together in Perth to address problems. Need to monitor situation overnight."
Environment Minister Roseanna Cunningham praised the efforts of the agencies involved in tackling the flooding during a visit to Perth and Bridge of Earn.
She said: "We are all aware of the serious impact that flooding can have on homes, communities and businesses.
"For the past two months communities across Scotland have shown fantastic resilience in the face of one of the most severe winters in living memory, but it is a reality that after so much snowfall we were likely to face flooding issues as the icy conditions turn to thaw and rainfall."
She said the Floodline Service on Sepa's website was available 24 hours a day to provide information and advice.