Dangerous flooding is impacting Hawaii’s Oahu island, prompting evacuations and a warning from local officials of a possible dam collapse, as major rains pummel the area for the second significant rain event in a week.

An evacuation order was issued early Friday morning local time for Haleiwa and Waialua, including areas near the Wahiawa Dam, according to Oahu Emergency Management, which warned that the dam “may collapse or breach at any time.”

The dam “has not failed but is at imminent risk of failure,” Oahu Emergency Management said mid-morning local time Friday.

“Potential for life-threatening flooding and catastrophic amounts of fast-moving water in downstream areas,” the agency warned.

Hawaii Gov. Josh Green said the Hawaii National Guard has been activated and other resources are being deployed across Oahu amid the “severe storm.”

“We are coordinating closely with state and county partners to support evacuations, open shelters, and keep our communities safe,” he said on X