NEW YORK —The storm that had been Hurricane Irene crossed into Canada overnight but wasn’t yet through with the US, where floodwaters threatened Vermont towns and New Yorkers feared a commuting nightmare as their transit system, shut down ahead of the storm, was slowly restored.

The storm left millions without power across much of the Eastern Seaboard, left more than 20 dead and forced airlines to cancel about 9,000 flights. It never became the big-city nightmare forecasters and public officials had warned about, but it still had the ability to surprise.

Many of the worst effects arose from rains that fell inland, not the highly anticipated storm surge along the coasts. Residents of Pennsylvania and New Jersey nervously watched waters rise as hours’ worth of rain funneled into rivers and creeks. Normally narrow ribbons of water turned into raging torrents in Vermont and upstate New York late Sunday, tumbling with tree limbs, cars and parts of bridges.

“This is not over,” President Barack Obama said from the Rose Garden.

Hundreds of Vermonters were told to leave their homes after Irene dumped several inches of rain on the landlocked state. Video posted on Facebook showed a 141-year-old covered bridge in Rockingham swept away by the roiling, muddy Williams River. In another video, an empty car somersaulted down a river in Bennington.

Green Mountain Power warned that Montpelier, the capital, could be flooded twice: once in the initial storm and again if the utility decides it must release water to save the earthen Marshfield Dam, about 20 miles (30 kilometers) up the Winooski River to the northeast.

“We don’t want to do it. But if the dam were to be compromised, it would be a far greater effect,” utility spokesman Dorothy Schnure said. Residents of 350 households were asked to leave as a precaution.

Nearly 5 million homes and businesses lost power at some point during the storm. Lights started to come back on for many on Sunday, though it was expected to take days for electricity to be fully restored.

(AP)