The governor, Josh Green, addressed a news conference saying that the flooding has been the biggest in the state in a 20-year period.

The second serious storm in a week floods the state, which implies that the soil was already wet at the time when the flooding started.

“Nobody had disappeared or died yet,” Green added.

On Saturday (all times local), Green spoke to CNN’s Fredricka Whitfield and gave news that 236 people have been rescued under treacherous conditions by crews.

“Approximately 10 of them were hospitalised with hypothermia,” Green said at a news conference on Friday.

The storm may end up incurring over US1 billion (NZ1.7 billion) in both public and private sector damages across the states, including the governor.

Flash floods have swept away houses, ruined aircraft and hospitals, and isolated towns on Oahu.

The Wahiawa dam, in the North Shore region of Oahu, was in danger of a collapse or breach on Friday, as reported by the Oahu Department of Emergency Management.

The people of the towns of Waialua and Haleiwa were advised to evacuate immediately because of the possible life-threatening floods.

The area is still at risk of a flash flood warning and evacuation notice.

It was later at night on Friday when the levels of water at the dam started dwindling. The Oahu Department of Emergency Management said on Saturday that the dam was still being monitored when the levels were still high.

Green told CNN on Saturday afternoon that it appeared to be on track, now that the trend was falling downwards.

“We are almost in a good place, it looks like, but it is an old dam.”

What a storm that we are going through. Green continued, ” This storm will last two days at least.”

Officials also warned that all roads would be threatened to collapse in the Waialua region.

On Friday, the emergency management department sent out an alert warning people to leave immediately because the conditions were unsafe, lest they get stuck.

The evacuation orders were being issued around Waialua, and resident Kathleen Pahinui told the Associated Press that she was planning to evacuate to a higher ground home belonging to a friend. “Wahiawa dam,” she said, “was a concern to many in the community every time the downpour occurred.”

“Just pray for us,” she said. “We know it is going to rain more.”

The dam risk area, which is estimated to have around 4000-5000 people, was also mentioned by Molly Pierce, spokesperson of the Oahu Department of Emergency Management, on Friday. The larger region that is affected by floods in the North Shore has a population of slightly less than 10,000 individuals.

North Shore has been under a flash flood warning since early Friday, when the rain has been pounding the island. According to Pierce, it is not clear how many homes in the region are destroyed.

Others among the rescued had been hoisted off the roofs, Green told CNN affiliate Hawaii News Now.

There were 70, according to Green, who were surrounded by water in a campsite up on the North Shore.

“They said they are okay at the moment, but were having trouble getting out, they told me, because of all the water they had around them.”

Green posted to social media on Friday that the Hawaii National Guard has been activated as well.

“More resources are still being deployed throughout Oahu. We are also working hand in hand with our state and county partners to assist with evacuations, open shelters, and make our communities safe.”

On Friday, the department said it airlifted 72 children and adults who had been at a spring break youth camp on the west coast of Oahu by the Guard and the Honolulu Fire Department.

The US Coast Guard air and sea vessels were also brought to the Haleiwa area, where the agency advised the people to avoid entering or driving through standing or fast-moving water.

“Emergency responders were having a hard time reaching the flooded area early Friday morning when two primary access roads into the area – Kamehameha Highway and Kaukonahua Road – were flooded,” the spokesperson of the emergency management said, Pierce.

“All roads to the area are now flooded, both entering on the central half of Oahu and the Kahuku North shore side. Every passage is swamped at the moment,” Pierce said.

Rain’s new Kona storms wrecked Oahu last night, and fell upon it in heavy bands, soaking it and pouring two to three months of rain on the island within 24 hours. The amount of rainfall has reached up to six 12 inches (15 to 30cm) of rain on the north half of the island.

It is the result of the great storm of last weekend that the ground is saturated and water is running off at a quicker rate, resulting in more serious flooding.

On Oahu, it can still rain heavily on Saturday, but it has been relatively dry in Maui County, which has been affected by the bulk of the rain. There is a flood alert that has been issued in all the islands up to Sunday afternoon.

An evacuation warning was declared by authorities in Maui in Lahaina as nearby retention ponds filled up. The neighbourhoods that were affected were some of those that were burnt in the wildfire that hit the town in 2023.

Dangerous flooding, landslides, sinkholes and the disconnection of power to thousands of people throughout the state appeared as a result of the heavy rain and high winds of last week’s storm.

The storm brought over 15 inches of rain throughout the islands of Hawaii; however, higher elevations of Maui Island received the greatest amount of the earthly fluid with a record of over two feet (61cm).

Maui was also affected the worst: It is reported that at least one home and a condo building were destroyed as a result of flooding, according to Hawaii News Now.

Floods were also being rescued in South Maui by the emergency crews, and some residents were stranded with a lot of road closures across the island, according to Hawaii News Now.

The storm and a disaster relief period through 13 April has seen the issue of a number of emergency proclamations by Green.

The storm should dissipate at the beginning of the week and improve the conditions.