Residents on the Hawaiian island of Oahu are contending with the worst flooding the state has seen in more than 20 years, forcing thousands to abandon their homes. The Pacific island’s North Shore, known worldwide for its surfing waves, is experiencing the brunt of the storm, with forecasters predicting additional rainfall in the coming days.
Severe Flooding and Evacuations
Rivers of muddy water swept across the island on Thursday and Friday, damaging cars and homes and washing away roads. At least 5,500 people north of Honolulu have been evacuated. Hawaii Governor Josh Green stated on Friday that “What we have is going to have a remarkably serious consequence for us as a state.” He identified this week’s flooding as the worst Hawaii has experienced since 2004.
Honolulu Mayor Rick Blangiardi added, “There’s no question that the damage done thus far has been catastrophic.” Damage to private and public property is estimated to exceed $1 billion.
Worsening Weather Patterns and Dam Concerns
Even as Hawaii typically experiences wet winter weather due to ‘Kona lows,’ experts suggest these weather patterns are becoming more intense due to human activity. The US National Weather Service reported 16 inches of rainfall overnight Thursday at Kaala, Oahu’s highest peak, with other areas receiving between 8 and 12 inches. Flood watches and flash flood warnings remain in effect for the North Shore, with another 6 to 8 inches of precipitation expected over the next few days.
More than 230 residents have been rescued, including 70 children and adults airlifted from a Catholic youth camp by the US National Guard and the Honolulu Fire Department. Rescue efforts have been hampered by individuals flying drones in the area.
A significant additional threat stems from the Wahiawa Dam, built by the Dole Food Company. As of Friday, water levels had reached 25.6 meters, just 1.8 meters below overflowing, after rising more than 1.5 meters overnight.
Dam History and Current Status
State officials have sought repairs to the dam since 2009, and Dole was fined $20,000 five years ago for failing to address safety concerns. Dole previously offered to donate the dam to the state contingent on Hawaii repairing the spillway. Legislation authorizing the state’s acquisition of the dam passed in 2023, with a board vote scheduled for next week. Dole stated on Friday, “The dam continues to operate as designed with no indications of damage.” Hawaii regulates 132 dams, many originally built for irrigation.
On Friday, the Oahu Emergency Management Agency ordered 4,000 residents near the Wahiawa Dam to “LEAVE the downstream area NOW!” Residents were again urged to evacuate on Saturday and seek shelter as flash flooding continued.
Frequently Asked Questions
What is a ‘Kona low’?
A ‘Kona low’ is a type of weather system that traditionally brings wet air to Hawaii during the winter months.
How many people have been evacuated?
At least 5,500 people have been evacuated north of Honolulu due to the flooding.
What is the estimated cost of the damage?
Hawaii Governor Josh Green estimated damage to private and public property could exceed $1 billion.
As authorities continue to respond to the immediate crisis, what long-term strategies will be necessary to mitigate the risks posed by aging infrastructure and increasingly severe weather events?
