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VALLEY PARK, MO  – Massive flooding in the St. Louis area has caused another wastewater treatment plant to shut down.

The Metropolitan St. Louis Sewer District says the sewage treatment plant in Valley Park closed Thursday after water from the Meramec River flowed over a wall of sandbags built around the plant.

It wasn’t immediately clear if the shutdown was causing raw sewage to flow directly into the Meramec.

On Monday, floodwaters caused a power outage that shut down the wastewater treatment plant in Fenton, another St. Louis-area town, diverting raw sewage into the Meramec.

A water plant also flooded in High Ridge, south of St. Louis. Tanker trucks were bringing in water, but customers were urged to conserve.

And a sewage treatment plant in the southwest Missouri town of Springfield also closed earlier this week, allowing raw sewage to escape.