Weather in Wales: Warning of floods and travel problems
Homes and businesses are likely to face flooding and some communities could be "cut off" as heavy rain is expected to hit Wales.
The Met Office issued an amber rain warning across most of Wales from midday on Saturday to 12:00 BST on Sunday.
It said fast-flowing or deep flood-water could cause "danger to life".
Many places will see 1-2in (25-50mm) of rainfall, with totals of 2.5-3.5in (70-90mm) expected on higher ground.
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More than 4.5in (120mm) is expected in some of the most exposed high ground of Snowdonia.
The warning, which also covers large areas of south-west England and parts of the West Midlands, comes after a day of downpours on Friday, as Storm Alex moved in from France.
The warning covers Anglesey, Blaenau Gwent, Caerphilly, Carmarthenshire, Ceredigion, Conwy, Denbighshire, Flintshire, Gwynedd, Merthyr Tydfil, Monmouthshire, Neath Port Talbot, Pembrokeshire, Powys, Rhondda Cynon Taf, Torfaen and Wrexham.
There are several flood warnings in place, according to Natural Resources Wales.
The Met Office warned that delays and cancellations to train and bus services were likely and conditions would make driving difficult.
"The unusual wind direction associated with the rainfall will mean that the peak rainfall totals are likely to occur in some areas that are usually well sheltered and drier during unsettled spells of weather," its forecast warned.
Road police in Powys tweeted they had been dealing with a crash on the A40 Brecon bypass which has now been cleared.
However they added: "With the heavy rainfall we are experiencing today please drive to the road conditions."
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Two temporary water pumps have been set up in a Rhondda Cynon Taf village already hit four times by flooding this year.
The pumps are to provide "added protection and reassurance" for residents of Pentre.