There are still road closures across Wales, including the M48 Severn Bridge in Monmouthshire, due to high winds.
Transport for Wales is asking passengers to check timetables before travelling as many trains are not running
Great Western Railway said the severe weather had left all lines blocked between Cardiff Central and Carmarthen, with services “unlikely” to resume before 12:00.
Irish Ferries cancelled service to Wales for most of Sunday, with some Pembroke and Holyhead sailings scheduled for later.
The last red warning in Wales was during 2022’s Storm Eunice, which left tens of thousands of people without power.
NRW said before the storm the amount of rain expected would be less than that which fell during Storm Bert, which wrought havoc across Wales last month.
