US President George W Bush has warned Texas will take a long time to recover Rescuers search storm-hit Texas ...
Houston braces for Ike ... from Hurricane Ike, as a huge search and relief operation gathers pace.
Mr Bush will travel to the state on Tuesday to inspect the relief effort.
Rescuers are trying to get to thousands of people who ignored orders to flee the storm, which cut power to millions and mauled America's oil hub.
"This is a tough storm and it's one that is going to require time for people to recover," Mr Bush said.
Ike has been blamed for four deaths so far, two in Texas and two in Louisiana.
Rescuers are using boats, lorries and helicopters to tackle roads waist-deep in water and blocked by felled trees.
The storm made landfall in Galveston early on Saturday with 110mph (175km/h) winds.
It cut a 500-mile (800-km) swathe of destruction across a span of the Gulf of Mexico coast before weakening to a tropical depression on Sunday morning over Arkansas.
Ike severely hit oil and gas production in the region and wreaked at least $8bn (Ј4.5bn) in onshore damage.
Texas senator Kay Bailey Hutchison warned that oil refineries disabled by the hurricane could remain idled for a further eight or nine days - and that Americans should brace for possible fuel shortages.
Some coastal residents waded through chest-deep water with their belongings and children in their arms to get to safety on Saturday, but thousands of others ignored evacuation orders.
Mr Bush said the federal government would be delivering 1.5m litres of water and 1m meals daily for the displaced.
Distress calls
Police, paramedics, rescue dogs and structural engineers fanned out at daybreak on Sunday across the coastal city of Galveston, which took the brunt of the storm, hampered by floodwaters and widespread wreckage.
Galveston police officer Tommie Mafrei said: "What's really frustrating is that we can't get to [the stranded]... They are naive about it, thinking it's not going to be that bad."
State Governor Rick Perry's office said 940 people had been rescued by nightfall on Saturday, but that thousands had made distress calls the night before.
Officials said another 600 people were rescued in neighbouring Louisiana, where flooding ruined tens of thousands of homes and left nearly 200,000 householders without electricity.
More than three million people had no power in Texas at the height of the storm, and the authorities said it could be weeks before supplies were fully restored.
Ike sent fuel prices higher at the pumps and, analysts say, has triggered the biggest disruption to US energy supplies in at least three years.
Production was shut down at 14 oil refineries and 28 natural gas processing plants in the storm's path.
The hurricane also battered Houston, the fourth-largest city in the US and the nation's oil hub. Police there had used bullhorns to order people back into their homes.
The BBC's Rajesh Mirchandani weathered the storm in Houston and described how ferocious winds ripped the glass from many of the city's skyscrapers.
But officials were encouraged by the fact flooding brought by the storm surge turned out to be much less serious than forecast.
Among those killed by Ike were a woman in Pinehurst, Texas, and a teenage boy in Louisiana's Bayou Dularge, AP news agency reported.
Last week, Ike caused devastation in Cuba and Haiti, where hundreds of people have died in several tropical storms over the last month.
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(BBC)
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