Roads across Dacorum are closed this morning after overnight rain caused flooding making some areas impassable.
The continuing downpours meant rush hour misery for workers this morning.
The A41 at Tring is closed due to abandoned cars and surface water, according to police.
There are problems in Nash Mills, Redbourn and Long Marston. Red Lion Lane and Durrants Hill in Apsley have been closed to traffic and Primrose Hill in Kings Langley is also shut off.
Hemeltoday has requested a full list of road closures from Herts Highways and will publish it as soon as possible.
Meanwhile, Herts Police are urging motorists to take extra care on roads this morning and to only make essential car journeys.
Officers say surface water is causing a major problem in all areas, with many drivers becoming stuck after misjudging the depth of flood water on some roads.
The force’s control room has been inundated with calls relating to the severe weather and police are urging people to only use 999 in an emergency. All other calls should be made via the non-emergency number 101.
Herts Fire and Rescue Service is also busy dealing with flooding and has received almost 200 calls since midnight.
Lynn Foster, 64, of Chapel Lane, lives in one of the homes that was flooded in Long Marston.
She said this morning: “We are under water and have water indoors and a foot of water outside. The whole of Long Marston is flooded at the moment.”
She and husband Keith were woken by neighbours at 4am and since then two fire engines have been sent out to help clear the water.
Villagers and staff from Dacorum Borough Council are out laying down sandbags to try and stop it getting any worse, she said.
She said: “I have got wellies on and it’s coming over my wellies outside. At least six homes have been flooded. We can’t go to the toilet, wash up or shower because the drains are full.”