HOUSTON (AP) — Officials say a levee near a subdivision of homes in a county south of Houston has been breached and water is pouring into the area.

Brazoria County posted this message on Twitter on Tuesday morning: “NOTICE: The levee at Columbia Lakes has been breached!! GET OUT NOW!!!”

Brazoria County Judge Matt Sebesta says that the water has come over the levee in the northeast part of the subdivision and is starting to fill the area.

He says residents were told that at some point the levee would be “overtopped.” He said that a mandatory evacuation order was issued Sunday.

Sebesta says there are hundreds of homes there. He says hopefully “very few” are still in the area.