Twenty-five to 35 million gallons of raw sewage is pouring into the ocean every day and could keep flowing all summer long. Imperial Beach Mayor Serge Dedina tweeted Friday about the fluctuating flow rate of the Tijuana River, which could indicate that parts of Mexico are using the river as an open sewer. Dedina recently told KUSI “this could be the worst round of pollution we have ever seen coming at us. In 2017, we had 250 million gallons spilled, now we have 50 million gallons, a minimum of 50 million gallons every single day.”