Two drivers were killed and 60,000 people were left without power as gales reached speeds of up to 124mph in Scotland overnight.
Winds of 124mph were recorded
A driver was killed when his car was crushed by a lorry blown over on the A1 near Burnmouth on Tuesday evening. The lorry driver suffered minor injuries.
In Tayside, a van driver was killed when his vehicle and a lorry were in collision on the A90 northbound.
The storms have also left thousands of homes without electricity.
Scottish Hydro Electric, the main power supplier in the north of Scotland, said a total of 60,000 customers had been cut off by the freak weather and some 150 major faults had been reported on the network across Scotland.
A spokesman said: "We have had to stand our repair staff down for the night because it's simply too dangerous for them to work in these high winds."
Many roads in rural areas have been closed and drivers are being urged to take extra care in the high winds.
The Tay Road, Erskine and Skye bridges were closed while the Forth Road and Kessock bridges were also shut down to high-sided vehicles.
The Western Isles has borne the brunt of the storm with gusts of 124mph recorded on North Rona, while winds reached 105mph on Barra.
But the PA Weather Centre warned the storm would not peak until the early hours of Wednesday.
Forecaster Joanne Grimshaw said: "There's no let up yet as it looks like the severe weather is going to continue until dawn.
"It should peak by daylight and then ease off as the storms move north-eastwards towards Scandinavia."
A spokesman for the Scottish Environment Protection Agency (Sepa) warned that rain falling on already wet ground could cause river levels to rise rapidly.
CalMac ferry sailings have been cancelled due to the bad weather
"We would urge those living, working or travelling in areas where flood alerts are in force to remain vigilant and keep up-to-date with the latest flooding information through Floodline," he said.
The ferry company CalMac suspended all its 26 routes between the Scottish islands and the mainland and advised passengers to listen to travel reports, use its website or phone 08457 650050 to find out the most up-to-date information.
P&O also cancelled all its ferries between Scotland and Northern Ireland while NorthLink, which operates services from Aberdeen to Orkney and Shetland, had also confined vessels to dock.
Trains will also be affected. First Scotrail have warned they may not be able to operate early morning services because lines will have to be checked for obstructions before trains can run.
All schools and council offices in the Western Isles are to close on Wednesday for safety reasons.
All routine operations and non-urgent procedures at Western Isles Hospital in Stornoway scheduled for Wednesday have been postponed.
How has the severe weather affected you? Send us digital pictures of the gales and rain in your part of the country. E-mail them to firstname.lastname@example.org