HONOLULU (AP) — Muddy floodwaters from severe rains inundated streets, pushed homes off their foundations, swallowed vehicles and prompted evacuation orders for thousands of residents in towns north of Honolulu on Friday as officials warned of the possible failure of a 120-year-old dam.

Emergency sirens blared along Oahu’s North Shore, where rising waters damaged homes in a community world-renowned for its surfing. Honolulu officials told residents Friday morning to leave the area downstream of Wahiawa dam — long known to be vulnerable — saying it was “at risk of imminent failure."

There were no immediate reports of deaths or injuries, but some homes had been swept away, said Ian Scheuring, a spokesperson for Honolulu. Crew searched by air and by water for people who had been stranded — efforts that were hampered by people flying personal drones to get images of the flooding, he said.

Dozens — if not hundreds — of homes had been damaged but officials have not been able to fully assess the destruction, Honolulu Mayor Rick Blangiardi said in an afternoon news conference. Some 5,500 people were under evacuation orders.

"There’s no question that the damage done thus far has been catastrophic,” he said.

Blangiardi said officials felt confident in the stability of the dams on the island, but that it was hard to predict how much rain would come and what it might do.

The National Guard and Honolulu Fire Department airlifted 72 children and adults who had been attending a spring break youth camp at a retreat on Oahu’s west coast called Our Lady of Kea’au, according to city and camp officials. The camp is on high ground but authorities didn’t want to leave them there, the mayor said.

Kimberly R.Y. Vierra, a spokesperson for St. Francis Healthcare System of Hawai‘i, which owns the retreat property in west Oahu, said floodwaters had cut off the entrance road to the camp.

On Maui, officials issued an evacuation advisory for some Lahaina neighborhoods after nearby retention basins neared capacity. Parts of those neighborhoods were burned by the massive wildfire that destroyed much of Lahaina in 2023.

Officials have been watching dam levels since a storm last week dumped heavy rain across the state, which led to catastrophic flooding that washed away roads and homes. After the worst of it, a similar but weaker storm was forecast to bring more rain through this weekend.

Source: WPLG