Water levels in Oxford are now not expected to reach their peak until Wednesday afternoon.
With a severe flood warning still in place for the Osney Island and Botley Road areas of the city, the Environment Agency predicts more homes will be flooded.
Agency spokesman Dave Ferguson said: "Due to the nature of the flooding we are expecting it to have quite an impact.
"Based on the latest information we have, we expect water levels around the Osney Island and Botley area to reach their peak some time tomorrow afternoon.
"We advise people to remain calm and to listen to the advice they are given by the emergency services."
The Environment Agency is also advising people to be prepared for a possible evacuation of their homes.
Anyone who feels they are in immediate danger should call 999.
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