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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The Hammers moved to the Olympic Stadium in May leaving their old site to be developed for housing.
The first officer shouted "look!" as the drone passed next to the right wing at around 11,000ft above south-east London.
They found a sheepish looking ewe with a traffic cone on her head in the middle of a field.