US President Donald Trump is visiting Texas for a second time in the wake of Hurricane Harvey.
The hurricane made landfall in the state a week ago, causing devastating floods.
Some residents have been allowed to return to their homes but flood waters are still rising in other areas.
Harvey has been blamed for at least 47 deaths, and about 43,000 people are currently housed in shelters. Mr Trump has asked Congress for $7.8bn (£6bn).
The sum would be an initial payment to help with recovery efforts following the flooding in both Texas and Louisiana, which has also hit production at America's main petrol and oil refining centre.
Governor of Texas Greg Abbott has said the state may need more than $125bn in aid.