Heavy rain is again causing flash flooding in Herefordshire with the M50 partly under water.
Leominster Ambulance Station will be out of action for six weeks
Motorists are also being advised to move cars from the Merton Meadow car park in Hereford which is starting to flood once more.
Meanwhile, the threat of a landslide over a steam railway tourist attraction is still high, police have said.
Northwood Lane, near Northwood Halt in Worcestershire, has been closed amid fears rock and debris is about to fall.
The M50 motorway between Ross-on-Wye and the M5 is open but drivers are facing delays due to standing water in the central reservations.
West Mercia Police have issued a warning of flash flooding across Herefordshire, Shropshire, Telford and the Wrekin and Shropshire as the Met Office predicting more heavy downpours.
Droitwich High Street, and roads around Pershore, Defford and Evesham are also under water although it is expected they will clear quickly once the rain has stopped.
The suggested route into Evesham on Thursday afternoon was the A422.
Residents in six homes near the Severn Valley Railway which had to be evacuated amid fears they could be in danger have been told they may not return until Sunday.
A police spokesman said engineers at the site reported that the land was continuing to move.
Severn Valley Railway spokesman David Wilcock said an entire hillside could potentially fall on to the line.
The attraction, which runs from Bridgnorth in Shropshire to Kidderminster in Worcestershire, suffered landslides in at least nine locations during June's heavy rain and the repair bill now stands at £2.5m.
Merton Meadow car park completely flooded, pic by Richard Lewis
Sgt Chris Aimes, of Bewdley Police, said: "The decision to evacuate people from their homes was not taken lightly.
"In the present situation this location is an extremely dangerous place to be, as the potential for a full slip of the embankment remains high.
"If the land does slip then it will do so without warning and will happen swiftly. We are urging people to use common sense and to keep away from this area, until they are advised it is safe to return."
Conservative leader David Cameron was expected to visit Upton-on-Severn on Thursday, one of the areas in Worcestershire that had suffered most from flooding over the past week.
A patient being treated by a paramedic at his home in Uckinghall, near Upton-on-Seven had to be winched on board an RAF Sea King Helicopter as the flood waters around his home are still too deep.
The paramedic treating him, Jo Haskins, had to be taken to the address on a Fire Service boat. The patient has been taken to Cheltenham General Hospital where his condition has stabilised.
Leominster Ambulance Station, in Herefordshire, was also still out of action on Thursday.
A spokesman said the station, in Southern Avenue, was under two feet of water at the weekend and a considerable amount of damage was caused.
Ambulance officials said repairs could take up to six weeks.