Warning signs lined the sand at Coronado Beach this weekend as elevated bacteria levels linked to another sewage spill from Tijuana forced swimming closures along parts of San Diego County’s coastline. County health officials extended water-contact closures from Imperial Beach north through the Silver Strand and into Coronado after a recent break in a Mexican wastewater pipeline sent millions of gallons of sewage-contaminated water toward the Pacific Ocean. The closure comes despite emergency repairs completed this week on the cross-border sewer line that collapsed for the second time in recent weeks. … Mexican repair crews worked around the clock to seal the damaged international wastewater pipeline. The break increased flows through the Tijuana River Valley, where polluted runoff eventually reached the ocean.

Other Tijuana River news:

• SFGate: ‘It’s our livelihood at stake’: Businesses struggle due to toxic Tijuana River
• The San Diego Union-Tribune: Air purifier company sues San Diego County over $26.8M contract