The collapse of a decades-old multistorey building in Mumbai on Tuesday has revived focus on illegal buildings way past their sell-by date endangering lives in India's commercial capital, where finding an accommodation is a huge challenge. The Kesarbai building in south Mumbai's thickly populated Dongri area, home to many families, had been designated a "C1 building" by Mumbai's civic body in 2017 - which means it was marked for evacuation and demolition after a safety audit. Yet, it was left untouched.