Watch your step!
Hurricane Dorian Beach
Credit: Yaroslav Sabitov/Getty Images

Hurricane Dorian has long since departed, but that doesn't mean the danger has passed for beachgoers in the Carolinas.

Before the reopening of Cape Hatteras National Seashore on Wednesday, officials issued a rare warning to visitors, instructing them to be careful where they step.

"Beachgoers should be aware of ocean debris that may have washed ashore and buried items that were exposed during tropical storm conditions," the National Park Service advised in a news release shared Tuesday.

And that's not hyperbole. Earlier this week a couple found two Civil-War-era cannonballs unearthed by Dorian lying in the sand on Folly Beach in South Carolina. Thankfully, they called local authorities who were able to remove them safely.

Hurricanes have a habit of revealing long-lost treasures and even shipwrecks on Carolina beaches. But some of these relics, like missiles, mines, and bombs, can pose a threat.

The Charleston County Sheriff's Office shared on Facebook that staff spent the days following Dorian's landfall scanning beaches for "for any old bombs and ordnance revealed by erosion." They reportedly gave it the all clear.

WATCH: Floridians, Here's What to Do If You See a Sea Turtle Washed Ashore After Hurricane Dorian

Storm surges can also bury potentially dangerous debris in the sand…debris you definitely don't want to step on.

As far as relics are concerned, so far, it's been just those two cannonballs, but that doesn't mean there aren't other mysteries lying in wait. Be careful out there!