The coronavirus tightened its grip on San Diego Sunday, with the county reporting its first death and a significant increase in cases. This news came as state and local officials took a series of dramatic steps to combat the exploding pandemic. And Neighborhood Healthcare, with clinics in San Diego and Riverside counties, says it’s gotten donated gear from Habitat for Humanity and construction workers. Plus, on Saturday morning, the US border with Mexico was closed to all “non-essential” travel as part of the federal government’s effort to contain the Coronavirus pandemic. But people with valid reasons for crossing the border will still be able to.