To reduce the risk of another deadly debris flow, the first of six ring nets was installed Tuesday in San Ysidro Canyon by the nonprofit Partnership for Resilient Communities. The project is the result of more than a year’s effort securing permits and private fundraising. The debris-control nets will be installed in spots that can catch flood material: two in San Ysidro Canyon, two in Cold Spring Canyon, and two in Buena Vista Canyon. Depending on funding, Hot Springs Canyon and Romero Canyon will follow. To date, the nonprofit has raised approximately $4.5 million, with a target of $5.4 million to finish installation. The Partnership believes the protection provided by the nets may eventually affect the way red-zone lines are drawn, how evacuations are planned, and homeowners’ ability to get insurance.