Thousands of acres are underwater in California, and the flood could triple in size this summer | CNN (2024)

Corcoran, California CNN

Torrents and torrents of rain have drowned thousands of acres of farmland in California’s Central Valley this winter and resuscitated a lake that vanished decades ago. As far as the eye can see, water stretches to the horizon — across roads, across crop fields, through homes and buildings.

Now, the massive snowpack that piled up on the Sierra Nevada this winter is a dripping time bomb. As it melts, the flood could triple in size by summer, threatening the surrounding communities and costing billions in losses.

“All of the crops are completely flooded and ruined,” resident Martina Sealy said as she held her baby daughter and gazed out across white-capped water, where vast fields of cotton and alfalfa had grown all her life. “It takes a lot of jobs for people. That’s a lot of food that we provide for up and down California and all around the nation. It’s pretty scary.”

Even scarier when you realize the standing water that’s there now is just the beginning of their ordeal.

“This is just from the rain,” Sealy said of the flooded fields. “But when the snow melts, there’s nowhere for it to go besides here.”

Thousands of acres are underwater in California, and the flood could triple in size this summer | CNN (1)

Martina Sealy worries about how much worse the flooding will get as the snow melts through the spring.

Tulare Lake was once the biggest freshwater body west of the Mississippi until farmers consumed so much of the Sierra Nevada runoff that it dried up and, over the decades, the lake bed became crop land.

Water was always a concern here, but mainly because there was never enough. As thirstier crops like almonds and pistachios came into vogue, relentless pumping of groundwater made Corcoran one of the fastest-sinking areas of the nation, just in time for Tulare Lake to come back from the dead with a vengeance.

“The ground is literally sunk in some places by 10 or 15 feet over the past decade,” said Daniel Swain, a climate scientist at the University of California at Los Angeles. “That has literally changed the topography of the historical lakebed. Some places are lower even than they were the last time there was a big flood event.”

Longtime residents, like Sidonio Palmerin, remember how the last great flood in 1983 took two years to dry out while the loss of agricultural work hollowed out Corcoran.

“We lost half our school population and about one-third of our city population,” he recalled. “A lot of the people that were relocated lost their homes, their cars. It took a long time to recuperate.”

Since there was no massive snowpack to worry about in ’83 and the town was 10 feet higher, he’s among the town’s seniors who worry this time could be much worse.

“There are people that are disabled, people that don’t have transportation,” Mary Gonzalez Gomez said, standing in front of the only home she’s ever known. “And they’re so worried, if we get flooded, where will we go? What will we do?”

Thousands of acres are underwater in California, and the flood could triple in size this summer | CNN (2)

A person shovels snow in Mammoth Lakes in late March.

Thousands of acres are underwater in California, and the flood could triple in size this summer | CNN (3)

Raul and Mary Gomez, Corcoran residents.

As the water piled up, the city and local farming interests started using earth movers to raise the 14.5-mile levee that protects more than 20,000 residents and 8,000 inmates in two prisons.

“God willing, that’ll protect the city of Corcoran,” said Sheriff David Robinson of King County.

But he knows they are racing against the melting snow.

“We’ve been fortunate with a very slow, mild spring so far,” he said. “But we know the heat’s coming.”

“Our snowmelt this season will be like an ultra-marathon in duration,” the National Weather Service in Reno said this week, “and we are just getting started on the first mile.”

Last summer, UCLA’s Swain published a paper that predicted more intense weather whiplash on a planet overheated by fossil fuel pollution, and in a worst-case scenario, relentless atmospheric rivers could not only make Tulare Lake permanent again — but could turn it into a vast, inland sea.

“As disruptive and as damaging as this year’s flooding has been, it’s still nowhere near close to what we foresee is the plausible worst-case scenario,” Swain said. “We know that climate change is essentially putting the weather on steroids and giving us greater and greater chances of seeing these extremely heavy precipitation events and severe floods, even as we also see more severe droughts and that in the same part of the world.”

But for now, just the water that’s already here is enough to throw lives like Martina Sealy’s into uncertainty.

“Tulare Lake is back,” she said. “And it may take over and put us out.”

Thousands of acres are underwater in California, and the flood could triple in size this summer | CNN (4)

The resurrected Tulare Lake near Corcoran, California.

Thousands of acres are underwater in California, and the flood could triple in size this summer | CNN (2024)

FAQs

What parts of California will be underwater? ›

Parts of central Santa Barbara would be flooded, as would most areas around the San Francisco Bay. In the north, new ocean would reach Fairfield, while San Rafael would see significant flooding. In Oakland, the monument in Jack London Square would be subsumed, as would many coastal neighborhoods in the city.

Will California be underwater by 2050? ›

California has experienced about 8 inches of sea level rise over the past century, and this pace will accelerate after 2050. Many areas along California's coast already flood on a regular basis, and low-income communities of color are particularly impacted.

Why is there massive flooding in California? ›

Climate models show that flood risk is growing as atmospheric rivers—the storms that cause most large floods—become more intense. Risk is also increasing due to sea level rise and slope-destabilizing wildfires.

How does climate change affect flooding in California? ›

Scientists have projected that atmospheric rivers will grow more potent as temperatures continue to rise, and will become an even more dominant driver of California's water supplies and flooding.

Did California used to be underwater? ›

During the early Paleozoic, California was covered by a warm shallow sea inhabited by marine invertebrates such as ammonites, brachiopods, corals, and trilobites. During the Carboniferous and Permian periods, swamps covered areas of the state no longer submerged by the sea.

Is California water being dumped in the ocean? ›

California's rain bounty slips into the ocean and drought-shocked Central Valley farmers want an explanation. 95 percent of the water that collected in the Sacramento-San Joaquin Delta has been flushed out to sea, leaving frustrated farmers with lots of questions.

What part of California is in danger of flooding? ›

Flood risk across California

Neighborhoods in San Mateo, Sacramento and Orange counties stand out as areas in California with large percentages of homes with major flood risk. A substantial number of Sacramento neighborhoods have more than 80% of properties at high risk of flooding.

Which California city has the most flooding? ›

Stockton and Sacramento were among the most likely to experience flood damage based on data from the 200 largest cities in the U.S. based on population size, which were then risk assessed based on potential for flooding from environmental data and ranked on the total number of homes at risk of flooding.

Is California flooding in 2024? ›

AER's FloodScan began mapping California's latest floods with satellite data recorded on February 5, 2024. This early look indicates extensive flooding in the Central Valley from the areas around Bakersfield north to Patterson, along the Salinas River from Paso Robles to Salinas, and around Santa Maria.

What will California be like in 2050? ›

In 2050, California will still have its Mediterranean climate, but as in the actual Mediterranean, average temperatures will be higher. That means that some of its wine grapes will not be thriving, and vintners will have had to accommodate by growing more heat-resistant varieties.

What will California be like in 2100? ›

If global greenhouse gas emissions continue at current rates, the state is likely to experience further warming by more than 2 degrees F more by 2040, more than 4 degrees F by 2070, and by more than 6 degrees F by 2100.

When was the last megaflood in California? ›

The last such megaflood happened in 1861, inundating a 300 mile-long (483km) stretch of the Central Valley and large portions of modern-day Los Angeles with water. It could happen again, any time.

What part of California will fall into the ocean? ›

No, California is not going to fall into the ocean. California is firmly planted on the top of the earth's crust in a location where it spans two tectonic plates.

How long until California breaks off? ›

The strike-slip earthquakes on the San Andreas Fault are a result of this plate motion. The plates are moving horizontally past one another, so California is not going to fall into the ocean. However, in about 12 million years, Los Angeles and San Francisco will be adjacent to one another!

What states will be flooded in 2050? ›

32 U.S. cities, including New York and San Francisco, are sinking into the ocean and face major flood risks by 2050, new study reveals. Rising sea levels and sinking land threaten 32 U.S. coastal cities with worsening floods, including New York, Boston, San Francisco, New Orleans and Miami.

Which US state will be most affected by a rise in sea level? ›

Florida is among the most exposed states in the country to sea level rise and coastal storms.

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