MOSCOW - Russian authorities said Wednesday that a flash flood had killed four people in the southern Krasnodar region where 172 people drowned in rising waters last month, many trapped in their homes. “Four people have died,” a spokeswoman for the regional emergency situations ministry told AFP. “Three people are listed as missing,” the Krasnodar regional government said in a statement. Heavy rain battered the coastal Tuapse area overnight causing many rivers to overflow and flood the houses and apartments of around 1,837 people, the regional authorities said. In July, 172 people were found dead after severe flooding in the Krymsk area not far from Tuapse.