Disruption is continuing after mid and north Wales were hit by flooding caused by Storm Babet.
Several roads remain closed, mainly in Flintshire, and there are 12 flood warnings and 15 alerts.
Natural Resources Wales (NRW) said the situation was improving but it still had “concerns” in communities around the River Dee and River Severn.
Ioan Williams, from NRW, said it could take a day for rainwater from upper catchment areas to reach flood plains.
“We’ve heard already of people being stranded in their cars,” he told BBC Radio Wales Breakfast.
“So just be really careful when you are out and about.”
Elsewhere, a second red “danger to life” weather alert in a week has taken effect in eastern parts of Scotland, with torrential rain and high winds forecast across parts of the UK.
In Wales, a Met Office weather warning for rain was lifted on Saturday morning.
Transport for Wales warned passengers to check before travelling on the Wales and Borders network with “disruption expected to continue”.
Customers with tickets for Friday will be able to use them over the weekend.
People had to be evacuated from flooded homes and many schools were forced to close, 52 in Flintshire alone.
North Wales Fire and Rescue Service said there had been more than 60 flood reports.
Some were in Flintshire, in places like Mold, and in Denbighshire towns including Denbigh, Prestatyn, St Asaph and Rhyl.
Mid and West Wales Fire and Rescue Service said the floods kept staff “extremely busy” on Friday.
Bronwen Hughes, head teacher at Ysgol Maes Garmon in Mold, told Radio Wales Breakfast it had to close due to the severity of Friday’s flooding.
“It was wasn’t an easy decision but the waters were rising,” she said.
The traffic and travel agency Inrix reported the main Wrexham to Mold road remained closed due to flooding on the A541 at Pontblyddyn on Saturday.
The A5 was also closed between Llangollen and Froncysyllte.