California is at risk of an enormous “superstorm” that could flood more than half of the state and cause billions in damages, scientists and experts said in a new report.

The researchers stressed the potential scale of damage that this storm could bring, which is about four or five times the amount of destruction from a massive earthquake.

Along with U.S Geological Survey, scientists warned federal and state emergency officials that geological history of California shows such “superstorms” have occurred in the past and it should be included in the long list of natural calamities they have to worry about.

The threat of a catastrophic California storm has been suppressed for the past 150 years. A 300-mile range of the Central Valley was submerged from 1861 to 1862 and the flood was so severe that the state capital has to be moved to San Francisco, Geological Survey director Marcia K. McNutt informed the New York Times.

According to geological evidence, even massive storms have happened in the past centuries over the dates 212, 440, 603, 1029, 1418 and 1605.

The risk is increasing now because of the elevating temperatures of the atmosphere, the scientists said. This has made weather patterns more unstable.

The scientists created a model that portrayed a storm that might last for more than 40 days and leave 10 feet of water on the state. It is said to move water as much as 50 Mississippis releasing water into the Gulf of Mexico. The report also noted that winds could reach 125 miles per hour while landslides could increase the damage.

Geological Survey scientist Lucy Jones told in a press released that they believe such superstorm happens once every 100 or 200 years.

Last week, federal and state emergency management officials assembled a conference regarding emergency preparations for possible superstorms.