Millions of gallons of sewage-tainted water from Mexico continue to pollute some of Southern California’s most popular beaches, triggering repeated closures and mounting health concerns for nearby communities. In Coronado, county officials have sounded the alarm, urging visitors to steer clear of the water as polluted runoff seeps into the coastline. Warning signs posted along the shoreline caution beachgoers that exposure could lead to illness. The contamination is largely tied to the Tijuana