The storm could dump up to 6 inches of rain in a very short time span — bringing a risk of deadly flash floods.

The fast-moving storm made landfall 75 miles east of Charleston, SC, and 85 miles southwest of Wilmington, NC, around 4 a.m., according to the hurricane center.

The storm is pushing north at 8 mph.

“Life-threatening” surf and rip currents are expected along the east coast from northeastern Florida to the Mid-Atlantic over the next day or so, according to the center.

South Carolina’s Emergency Management division also earlier warned residents of the possibility of isolated tornadoes along the coast and minor flooding.

Tropical Storm warnings are in effect across both states, and authorities have urged drivers to steer clear of flooded roads and heed barricades.

The storm comes as the death toll in the devastating Guadalupe River flash flood in Texas has risen to 51 — including 28 adults and 15 children in Kerr County.

Chantal is expected to weaken rapidly as it churns inland.

With Post wires