BRIDGEPORT — Seven United Illuminating crews arrived in the city Saturday to work on power restoration for the more than 1,000 customers still without power in the state’s largest city.

Mayor Joe Ganim said the seven UI crews were backed by city tree crews as cleanup and restoration efforts continued across Connecticut after Tuesday’s damaging storm.

When the storm hit, it knocked out power to roughly 1 million UI and Eversource customers in Connecticut. Fierce winds tore down trees, tree limbs and wires, causing hundreds of road closures throughout the state’s towns and cities.

By nearly 5 p.m. Saturday, 1,580 UI customers in Bridgeport remained without power.

Utility and city crews were on Beardsley Street in the East End on Saturday afternoon, where the mayor said the storm did “extensive damage.”

UI personnel have to clear wires or temporarily shut off power to allow the tree crews from the city to clear broken or downed trees, Ganim said. Once the trees are cleared, UI’s crews hop back in to fix or restore the power.

“UI indicating full restoration by end of day tomorrow (Sunday),” Ganim said. “Hang in there. Power (is) on the way.”

The mayor also asked residents not to throw tree debris or branches in the street. Instead, he said, residents should leave the debris on the curb and the city will clear it.