Hundreds of North Texas residents near the rain-swollen Wichita and Brazos rivers remained displaced from their homes Monday because of flooding, power outages or fears of contaminated waters.

In Parker County, west of Fort Worth, about 200 of the 2,000 residents living along the Brazos River still cannot get into their homes or travel trailers because of flooding. All residents were allowed to return over the weekend after evacuations late last week.

The Brazos had receded since Sunday and was less than a foot above flood stage Monday morning. But it was expected to rise if another flood gate was opened at Possum Kingdom Lake's dam, a tactic done to prevent the dam from breaking if more heavy rain comes.

"It's such a dynamic situation," Parker County spokesman Joel Kertok said. "We get a break, and then it starts raining again."

But farther downstream, the river is still overflowing its banks. People living in Horseshoe Bend and Rio Brazos cannot go home. About 100 homes -- mostly in Parker County -- have been under water since last week.

Damage assessment teams will be in affected areas Monday and Tuesday, and officials have asked that Parker County be included in the Federal Disaster Declaration.

About 125 miles northwest of Fort Worth, 600 homes evacuated last week in Wichita Falls remain without power. Four hundred of those are flooded.

Although the water has started to recede, officials have not determined when residents can return home. In the meantime, Health Department officials have administered tetanus vaccinations to 167 people and planned to give 100 more Monday, said city spokesman Barry Levy.

The Associated Press contributed to this report.