Volunteers in Spain have begun to leave the worst flood-hit areas of Valencia after taking part in clean-up operations after what’s been called the worst natural disaster in decades. The extensive flooding, which has so far killed 205 people, has sparked a wave of solidarity across the country with hundreds of people arriving to the affected areas on foot, carrying water, essential products, shovels and brooms to help remove the mud. The number of people coming to help has been so high that authorities have asked them not to drive or walk, because they are blocking the roads needed by the emer…