Sarah Simental s parents say she had no other health problems, and still, the virus took her life at such a young age.
A school will be closed if 5% or more of students and staff test positive within a 14-day period, officials said.
A districtwide shutdown will be triggered if 25% of the district s schools close within a 14-day period.
Schools would then transition back to remote learning.
California extended its strict stay-at-home orders Tuesday in areas where intensive care units are running out of beds, coming after Gov. Gavin Newsom warned residents to brace for the effect of a surge on top of a surge of coronavirus cases from holiday travel.