More rain is forecast for the state and a flash-flood watch remained in effect for all islands through tomorrow afternoon.

A weather band that dumped more than 7 inches of rain on portions of Kaua'i late Monday moved over O'ahu yesterday and led the National Weather Service to issue an urban and small stream flood advisory. That advisory was canceled yesterday afternoon, but the flood watch continued because of the threat of rain and the rain-soaked islands.

Forecasters are calling for cloudy skies with a chance of thunderstorms for Kaua'i, O'ahu, Maui, Moloka'i and Lana'i today and tomorrow. The rain is expected to let up on Friday, but heavy showers are forecast to return Sunday.

On the Big Island, locally heavy showers with a chance of thunderstorms are forecast through Sunday.

On O'ahu, all streets and highways were open as of 6 p.m. yesterday, according to O'ahu Civil Defense. But an emergency shelter was open by the American Red Cross at the Brigham Young University gym in La'ie as a precaution.

Yesterday's heavy rains fell primarily on Kaua'i and O'ahu. In a 24-hour period ending at 5 p.m., Mount Wai'ale'ale received 7.23 inches of rain, 'Oma'o 6.02 inches and Hanalei River 5.18 inches.

On O'ahu, more than 3 inches fell in Kahuku and Poamoho.

Meanwhile, city officials said crews yesterday continued to pump water out of flooded yards and other hard-hit areas in Ka'a'awa on Windward O'ahu. The city received state approval to dump the water in a nearby ditch, rather than transporting it to sewage treatment plants in Kane'ohe and Kailua.

Contaminated water signs have been posted near the ditch and along the shore where it empties into the ocean.

"What we're pumping now is mostly runoff," said Eric Takamura, director of the city Department of Environmental Services. "However, because we cannot be sure if the excess waters we are pumping includes wastewater from overflowing cesspools, we are posting the signs as a precaution."

Reach Curtis Lum at culum@honoluluadvertiser.com.