The Thames Barrier is due to reopen at 6pm after high tides earlier on.
But flooding is still causing problems for people in and around the capital.
In Sunbury-on-Thames, Surrey, children's parks and river paths are underwater.
Also, some trains coming into London are delayed due to two land slips in southern England.
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A ninth penguin was injured.
The animal killer is thought to have killed more than 250 creatures and has now been linked to the mutilation of a deer in south Croydon.
Some 82% rated their service as either 'satisfied or good' according to Transport Focus' spring survey - a rise of 3%.