Environment & Science

Rain leads to Los Angeles County issuing beach bacteria warning

File: Signs warn the public to stay out of the water in an area harboring high bacteria levels near a drain at Will Rogers State Beach on Aug. 7, 2007 in Pacific Palisades.
File: Signs warn the public to stay out of the water in an area harboring high bacteria levels near a drain at Will Rogers State Beach on Aug. 7, 2007 in Pacific Palisades.
David McNew/Getty Images

Los Angeles County health officials are advising swimmers and surfers to stay out of the ocean for at least three days because of runoff from this week's storm.

The rain advisory issued Tuesday came a day after the low-pressure system brought showers, lightning and some downpours to the region.

Bacteria levels can increase significantly during and after rainstorms as contaminants in the runoff enter the ocean via storm drains, creeks and rivers.

The advisory is in place through Thursday, when another round of rain is expected.