Three weeks worth of rain is forecast to fall in just two days, as parts of Wales are braced for yet more wet weather.

A yellow warning has been issues by the Met Office for a large part of the country, with up to 90mm of rainfall forecast for Monday and Tuesday.

In Wales, the average rainfall for March is 117mm, meaning the worst affected areas could see three weeks worth of rain in just over 24 hours.

The warning will come into place at 3pm and will last until midday on Tuesday.

The Met Office said: "Wet and windy weather will spread eastwards across Wales on Monday afternoon and persist until Tuesday afternoon.

"Some prolonged and heavy rain is expected, especially over higher ground. Most of Wales can expect 10 to 20 mm rain with many upland areas seeing 25 to 50 mm rain.

"Some hills and mountains may see 60 to 90 mm in some spots, the highest rainfall expected over high ground in Mid Wales."

Flooding of a few businesses and homes is likely, with bus and train services also likely to be affected, making journey times longer.

Some interruption to power supplies and other services is also likely.

Natural Resource Wales (NRW) says that the risk of flooding is low, but residents and commuters in Powys should still be aware that flooding is possible.

NRW have warned that the worst of the rainfall is expected over Mid Wales, affecting Ceredigion and Powys in particular. Communities along the River Severn are likely to be impacted with localised flooding and possible significant impacts, with traffic and travel disruption likely.NRW teams are already making preparations, checking defences are in good working order and making sure drainage grids and screens are clear, to reduce the risk to people and their homes.Jeremy Parr, Head of Flood and Incident Risk Management for NRW, said: “Our teams are keeping a close eye on the weather forecasts and the impact on river levels.“If rivers reach the trigger levels, flood alerts and warnings will be issued to people who have registered for the service in areas at risk. “With ground conditions still very saturated, there’s scope for flooding on roads across Wales, as water runs off saturated fields.“We’re advising people to take care whilst travelling and never walk or drive through flood water.”Powys residents to advised to keep an eye on weather reports and local news for details of disruptions, and to take extra care when driving as road conditions may be hazardous.