South Korean President Yoon Suk Yeol on Monday blamed authorities' failure to follow disaster response rules as the death toll from days of torrential rain grew to 40, including a dozen people found dead in a submerged underpass. The rains have pummelled the country's central and southern regions since Thursday as the rainy season that started in late June reaches its peak. The interior ministry has also reported nine people missing and 34 injured across the nation.