If you read through the collection times at this link )http://tea.texas.gov/Reports_and_Data/Data_Submission/PEIMS/PEIMS_Data_Standards/2017-2018_PEIMS_Collection_Schedule/)
you will see that there was an end-of-school submission that designated graduates and returning students by grade, a school start window submission that identifies returning and new enrollees, and an October window that firms things up. By comparing the students in each they can ascertain who should be there, who is, and who isn't. I spent 10 years at TEA and had a hand in identifying and correcting PEIMS errors, among many other things. Believe me, there is a wealth of individual student data available. If certain questions are added to a UIL/TEA query they can make a truly informed decision that will eliminate the problem of schools temporarily affected moving down, or schools with temporary refugees moving up, so the 2018-2020 alignment accurately reflects the actual enrollment, not a hurricane affected drop or jump. It's not rocket surgery, but it will require a targeted response to an unprecedented situation.