Texas Governor Greg Abbott has said the bill for reconstruction after Hurricane Harvey could be as high as $180bn (£138bn).

He said the damage was worse than that caused by Hurricane Katrina, which devastated New Orleans in 2005.

Meanwhile, the head of the government’s disaster management agency has warned that flood-hit states should not rely on Washington to pick up the bill.

Brock Long said Harvey should be a wake-up call for local officials.

Recovery operations are under way across Texas, and in neighbouring Louisiana, although many areas are still battling floodwater.

The devastating hurricane made landfall in the state a week ago and has been blamed for at least 47 deaths. About 43,000 people are being housed in shelters.

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The US government has already asked Congress for $7.85bn as an initial contribution towards recovery efforts, which Mr Abbott called a “down payment”.

He had previously said the state might need more than $125bn in aid, but revised that figure up on Sunday.