TIM COCKS SOUTH AFRICAN President Cyril Ramaphosa pledged to help the victims of devastating east coast floods, as the death toll rose to 306 from heavy rains that washed out roads and disrupted shipping in one of Africa's busiest ports. Ramaphosa visited families who had lost loved ones in KwaZulu-Natal province, including a family with four children after floods and mudslides ravaged their homes on Tuesday. Africa's southeastern coast is on the front line of seaborne weather systems that scientists believe global warming is making nastier - and predict will get far worse in decades to come. "You're not alone…