Towering
waves on Hawaii’s south shores crashed into homes and businesses,
spilled across highways and upended weddings over the weekend.
The
large waves, some more than 20ft (6m) high, came from a combination of a
strong south swell that peaked Saturday evening, particularly high
tides and rising sea levels associated with climate change, the National
Weather Service said Monday.
A
wedding Saturday evening in Kailua-Kona was interrupted when a set of
large waves swamped the event, sending tables and chairs crashing toward
guests.
Sara Ackerman, an author who grew up in Hawaii and attended the wedding, filmed the waves as they barreled ashore.
“It
just was huge,” she said. “I was filming it and then it just came over
the wall and just completely annihilated all the tables and chairs.”
She said it happened about five minutes before the ceremony was scheduled to begin.
She said they went ahead with the ceremony and cleaned up the mess after the newlyweds exchanged vows.
“We
had the ceremony and it was beautiful, having all the (sea) spray,” she
said. “The ocean was really wild. So it was great for the photos.”
Chris
Brenchley, the meteorologist in charge at the National Weather Service
office in Honolulu, said several factors came together to create such
huge waves.
“Waves over 12 or 15ft (3.66 or
4.57m), those become extremely big and really rare to have,” he said.
“It’s the largest it’s been in several decades.”
Brenchley said the swell was produced in the South Pacific, where it’s currently the winter season.
“They
had a particularly strong winter storm where the winds were focused
directly towards places like Samoa and then further on to the north into
Hawaii,” he said.
Remnants of Hurricane Darby passed south of Hawaii but had no major impact on the surf, he said.
While singular events like this hard to pin directly to climate change, Brenchley said the warming planet is playing a role.
“The
most direct type of impact that we can use with climate change is the
sea level rise. Any time you add just even small amounts of water, you
raise that sea level just a little bit,” he said. “And now those impacts
will be exacerbated whenever we have a large storm event or a ... high,
high tide.”
Most large summer swells that come from the south are no bigger than about 10ft (3m), which would trigger a high surf advisory.
“It
wasn’t like a life-threatening situation by any means whatsoever,” she
said. “It was just like, ‘Oh my gosh ... what are we going to do? Where
are we going to put the tables?”’
