Homes are flooded, train lines are blocked and bus services are delayed after days of heavy rain.
Stormy weather has caused widespread disruption across Wales including power cuts, flooding and train delays.
The National Grid says more than 600 homes in Wales are without power.
South Wales Fire and Rescue Service says five of its crews are dealing with flooding incidents, with Porth and Pontypridd, Rhondda Cynon Taf as the worst affected areas.
Transport For Wales said four railway lines are blocked, including Cardiff Central to Caerphilly.
It also said lines from Pontypridd to Treherbert, Abercynon to Aberdare, and Bridgend to Llantwit Major are blocked.
Great Western Railway also said its services were affected due to heavy rain.
The fire service added that a number of hillside and low-lying properties have been affected from run-off water and blocked culverts – these are tunnels which drain water away.
A yellow rain warning remains place until 17:00 GMT on Thursday across 16 of Wales’ 22 counties.
Image source, Marc Real
Group manager and head of community safety at South Wales Fire and Rescue Service, Bleddyn Jones said: “The incident in Tylorstown involves a blocked culvert which has affected around 20 to 25 properties, and we are hearing that ports around the Power Station hill area near Pontypridd, there’s some localised flooding in that area.”
⚠️Disruption – Flooding
Due to heavy rain flooding the railway, the following lines are blocked:❌Pontypridd – Treherbert❌Abercynon – Aberdare❌ Cardiff Central – Caerphilly❌ Bridgend – Llantwit Major
Check your journey: https://t.co/cDZlJCvAm5 pic.twitter.com/eFVlSoTEbq
— Trafnidiaeth Cymru Trenau Transport for Wales Rail (@tfwrail)
Natural Resources Wales has issued 26 flood warnings and 45 flood alerts as of 07:00 GMT on Thursday.
They said there is no widespread flooding from major rivers at present.
Leader of Rhondda Cynon Taf County Borough Council, Andrew Morgan said: “So far all the culverts that we’ve spent millions of pounds upgrading since Storm Denis have upheld.
“The amount of rain we’ve had has been exceptional.
“If your journey is not urgent stay off the roads for the next few hours so the highway crews and emergency services have a chance to respond.”
Head of operations south central at Natural Resources Wales, Mike Evans, said: “We’ve been suffering from quite severe conditions on top of several weeks of rainfall.
“The biggest impact is there is a lot of surface water around so I advise people to be very careful before leaving the house.”
Image source, Met Office
Stagecoach South Wales has reported that several of its services are cancelled or delayed due to the flooding.
In a tweet it also said it said there were heavy floods in Deri, Caerphilly county and Brithdir, Gwynedd.
Image source, Cllr Shon Rees
Dairy farmer Abi Reader from Wenvoe, in the Vale of Glamorgan, described overnight conditions on her farm.
“It’s been a wild night,” she told Radio Wales Breakfast.
“We’ve had electricity flickering on and off. The milking parlour had about a foot of water in it which we’ve had to pump out.
“There is flooding on the roads, we’ve got about 3 inches of water rolling across the roads.”
Meanwhile, the National Grid said power outages were mainly affecting around 450 homes in Newport and others in Penarth, the Llanelli area and Kenfig Hill, Bridgend.
Among the flood warnings in place from Natural Resources Wales, there are eight warnings for stretches of the River Severn in north Powys, four warnings for different stretches of the River Taff from Merthyr Tydfil to Pontcanna in Cardiff, and three warnings on the River Cynon.
The M48 Severn Bridge is closed in both directions between Chepstow and Aust in Gloucestershire.
The heavy rain has caused one of the main roads in Chepstow to close as Welsh Street between the town centre and the comprehensive school is shut and Gwent Police have advised drivers to avoid the area.