MIAMI -- Hurricane Wilma canceled many Halloween festivities in South Florida, where thousands of homes remain without power and many residents face evacuation from unsafe dwellings.

Government officials asked parents not to let their children trick-or-treat after dark Monday because debris from Hurricane Wilma on sidewalks and some streets posed hazards.

Bob Cole, of Miami Springs, kept his 7-year-old daughter, Celeste, at home instead of taking her trick-or-treating.

"There is a lot of dangerous stuff on the street -- downed wires, hazardous debris, generators unattended," Cole said.

The number of hurricanes that have struck this season frustrates him.

"It really has taken the luster off South Florida living," Cole said. "It's like living in a bowling alley. You don't know when the next one will come down."

Only three children, one dressed as Spiderman and two as Batman, were trick-or-treating Monday evening in a suburban Doral neighborhood that had been mostly cleared of debris.

Florida Power & Light, the state's largest electric utility company, said power has been restored to 78 percent of customers in Miami-Dade County whose electricity was knocked out in the Oct. 24 storm, but that left 210,900 homes and businesses without power. FPL said it hoped to have power fully restored by Nov. 13.

Public schools in Broward and Palm Beach counties were closed through at least Wednesday and in Miami-Dade through Tuesday.

One sign of progress was the lack of hours-long gas lines that plagued the area and frustrated residents in recent days. Though some gas stations are still closed, many were open and people only had to wait a few minutes, if at all, to fill their tanks.

Tolls will also be reinstated on Miami-Dade roads at 10 p.m. tonight.

The toll roads include the Dolphin Expressway, Don Shula Expressway, Airport Expressway, Gratigny Parkway and Snapper Creek Expressway.

Tolls remain suspended on Florida's Turnpike from Florida City to the Three Lakes mainline toll plaza in Osceola County, the Sawgrass Expressway in Broward County and Alligator Alley between Broward and Collier counties.

A Turnpike spokeswoman said officials would announce today when tolls will be reinstated on the Turnpike, Sawgrass and Alligator Alley.

The lower Keys and Key West reopened to tourists Monday. Previously, only residents were allowed in the area.

The death toll from Wilma climbed to 21 in Florida during the weekend, state officials said.

Wilma was the eighth hurricane to strike or pass by Florida in 15 months. It came ashore Oct. 24 as a Category 3 storm on the southwest coast. Weather officials said it dropped to a Category 1 or 2 as it slammed through Miami, Fort Lauderdale and West Palm Beach.

By Monday afternoon, the state listed about 1,500 people in emergency shelters, most in Palm Beach and Broward counties.

The state Senate's top Democrat called on Gov. Jeb Bush to take emergency measures to improve federal communication with state and local officials in the aftermath of Wilma. Some residents complained that the federal government was slow to respond and that they received faulty information on where and when to get aid.

"If Governor Bush is willing to shoulder the blame when things go wrong, he must also take it upon himself to remedy this disastrous situation," said Sen. Les Miller of Tampa. "Hurricane victims should not have to wait for help because the government can't get its act together."

He said Bush should ensure that the Federal Emergency Management Agency does a better job of distributing information and supplies to hurricane victims.

After touring areas damaged by Wilma, Bush said the state government at every level has done a good job of mobilizing resources after the storm, but the communities Wilma hit will feel the hurricane's effects for some time to come.

"A month from now, we'll be worried about the affordability of housing for people who lost their homes," Bush said. "We'll be worried about the agricultural communities in our state that have been devastated."

A citrus industry group said Monday that Wilma would cause the loss of $180 million worth of Florida's citrus crop, including nearly half of the state's grapefruit crop, based on preliminary estimates.