The Met Office has issued a weather warning for parts of South Wales, The Midlands and southern parts of England on Friday.
Torrential rain is likely to cause flooding in places, with two inches of rain possible across parts of Herefordshire, leading to river levels to rise.
The Met Office warning for Herefordshire says:
“Rain, heavy and persistent at times, is expected to develop through Thursday evening, before affecting much of England and Wales through Friday.
“Rain gradually clears from the north through Friday afternoon and evening.
“Widely 10-20 mm of rain is likely but in the wettest spots 30-50 mm is possible, and some high ground of Wales especially could see 60 to 70 mm.
“Across the south of the area its possible some thunderstorms may break out, and these could bring 20-30 mm of rainfall in a couple of hours.”