Hawaii is bracing itself for a big ass storm named Felicia that is slated to hit the tropical state later today. High surf warnings are in effect for the eastern-facing shores, with waves expected to reach as high as 18 feet.

“We want to minimize our first responders having to go out unnecessarily, especially with 10- to 15-foot surf expected on the east-facing shores,” Big Island Mayor Billy Kenoi told the Honolulu Advertiser.

However, the good news is that the tropical storm may be downgraded by the time it hits the island of Hawaii later today, according to KITV 4 meteorologist Justin Fujioka. Tracks located Felicia traveling north of the Big Island and is expected to hit Oahu on Tuesday.

The weather center said, “Felicia is expected to produce extremely heavy rainfall with the potential for widespread flash flooding, increasing on Tuesday and continuing into Wednesday.”