A flood warning has been issued on the River Wye from Hay to Hereford.
The Environment Agency says flooding is expected and immediate action required.
River levels have risen at the Bredwardine and Hay on Wye river gauges as a result of persistent heavy rainfall.
Consequently, flooding of property, roads and farmland is expected this afternoon.
The flooding is expected to affect properties and roads in and around Hay and Hereford areas including multiple stretches of the A438 between Letton and Willersley and Whitney on Wye. Road closures and diversions on the main A438 may be in force.