ANKARA, Turkey—Turkish authorities said Thursday the death toll from the severe floods and mudslides that struck the north of the country has risen to 11. One other person is reported missing. The floods battered the Black Sea coastal provinces of Bartin, Kastamonu, Sinop, and Samsun on Wednesday, demolishing homes and bridges, and sweeping away cars. Helicopters scrambled to rescue people stranded on rooftops. As floodwaters began to recede across the affected regions in Turkey’s north, a statement from the Disaster and Emergency Management Presidency, or AFAD, said rescuers had recovered six bodies in Kastamonu. Later Thursday, four more bodies were found in the worst-hit town of Bozkurt, in Kastamonu, and one body was found in Sinop. An 80-year-old woman was reported missing in Bartin province. Flooding inundated much of Bozkurt. One building collapsed and a second building was damaged in the town, the state-run Anadolu Agency reported. In Bartin province, …