A flash flood advisory for Oahu expired today at 11:45 a.m., but a number of beaches on Oahu and Hawaii island are under brown water advisories due to heavy rains overnight and this morning, state officials said.

The Clean Water Branch of the state Health Department issued brown water advisories for the following:

» Honolii Beach Park near Hilo Bay.

» Kailua Beach, Nanakuli Beach, Lanikai, Waimea Bay, and the surf spots Bamburas, Ala Moana Bowls and Rockpiles.

“The public is advised to stay out of flood waters and storm water runoff due to possible overflowing cesspools, sewer manholes, pesticides, animal fecal matter, dead animals, pathogens, chemicals and associated flood debris,” officials said. “If coastal waters are turbid and brown, stay out.”