The Madrona Marsh Preserve in Torrance was closed because of concerns about mosquitoes, authorities said Monday.
Daily mosquito monitoring by the Los Angeles County West Vector Control District suggested the need for closing the preserve. It will be reopened when testing indicates it is safe to do so, according to the city.
Mosquitoes present a danger of spreading West Nile virus, which has already killed one person in the county and sickened several others.
Residents are advised to avoid any areas where mosquitoes are active, particularly between dusk and dawn.
Never been to the Marsh? Watch this nice scene-setting video: