Mexico completed emergency repairs Thursday to a ruptured sewage line in Tijuana that spilled tens of millions of gallons of raw sewage into San Diego’s South Bay waterways over the weekend, but residents may continue smelling lingering odors. The Tijuana parallel gravity line break sent an estimated 40 to 50 million gallons of sewage into the Tijuana River, according to Chris Helmer, Environmental and Natural Resources Director for Imperial Beach. The massive spill caused hydrogen sulfide levels to spike in communities near the Tijuana River Valley, creating a strong rotten egg smell. … Helmer warned that similar infrastructure failures will likely continue, especially during storm events. With El Niño conditions expected this winter, he anticipates more potential breaks in Mexico’s aging sewage systems.

Other Tijuana River news:

• FOX5 (San Diego): Repairs completed on Tijuana wastewater pipeline, though odors may persist
• San Diego Union-Tribune: Federal officials renew contract with operator of South Bay wastewater plant