SAN DIEGO (FOX 5/KUSI)-- San Diego County officials will install warning signs in South Bay on Wednesday morning to alert the community of the dangers of toxic gases and contaminated air that have emerged from cross-border sewage pollution near the Tijuana River.

The warning signs will be installed at 8:30 a.m. at two major Tijuana River sewage hot spots in the U.S. near Saturn Blvd., which is located just northeast of the Tijuana River National Estuarine Research Reserve.

According to a press release from San Diego County officials, "The Tijuana River has long carried untreated sewage, industrial waste, and chemicals across the U.S.-Mexico border, creating an ongoing environmental and public health crisis."

San Diego County Supervisor Paloma Aguirre and San Diego Mayor Todd Gloria will

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