The sharp hike in Fulton County property value appraisals and tax assessments, which in some cases doubled, sparked an unprecedented 42,000-plus appeals last month—including dozens from low-income clients of the Atlanta Legal Aid Society who can’t afford a larger tax bill.

Legal Aid was able to help them, thanks to an army of volunteer lawyers coordinated by Laurie Rashidi-Yazd, who heads its two-year old pro bono unit.