My Students Grades

My student is a senior in high school he is accepted to the University of Calfornia Riverside, but recently my wife returned from India and got really sick, I was unable to take care of her that much, because my business would undergo issues and may drop down, but I have my son take care of her. I just realized that with the amount of work load a student has in IB I may have caused him to not be able to attend UCR. He has a D in IB Biology HL2, and a D in AP CALC BC. Although he is well over the amount of credits needed to graduate will he get rescinded?
Also his GPA is 2.8 weighted and 2.1 unweighted, what are his chances?