The city of Galveston is without power, water and gas, and re-entry is being restricted to authorized personnel only.
Remaining residents of the island, which took the brunt of Hurricane Ike's force, are being asked to leave. Bus service is available for those who want transportation to shelter facilities, according to a city news release.
The city's curfew of 6 a.m. to 6 p.m. has been extended indefinitely. No phone service is available.
City officials and the Texas Commission of Environmental Quality are urging residents to boil drinking water for two minutes.
Those who evacuated were being urged Monday not to return yet.
City Secretary Pauline Small said that while the city has "some power in scattered areas," most residents are still without electrical service. City workers on Monday were seeking a generator to power the sewer system, which is off-line.
A temporary medical-treatment area has been established in the Hobby Lobby parking lot at 20091 Interstate 45 for emergency services.
Updates are posted on the city's Web site at www.cityofwebster.com.
La Marque was without sewer service on Monday, and residents were advised to boil drinking water.
No medical facilities and shelters were available. Residents with special needs were asked to go to the city's fire department at 1111 Bayou Road for transportation to the George R. Brown Convention Center in Houston.
Those without transportation can call 409-938-9260 or contact the fire department at 409-938-9260.
City Secretary Ann Vernon said the only distribution site for basic supplies in the city was at the Clear Lake Park location.
"It created a big traffic jam and was hard to get into," Vernon said. "The truth of the matter is there's nothing here in El Lago."
She said she'd made phone calls to both FEMA and the Red Cross, but had been unable to locate ice or supplies anywhere. The "biggest hurt" is lack of ice and limited supplies at the stores, she said.
In the city's commercial district, some apartments and condos were destroyed.