Floods are one of the most devastating natural hazards you’re ever likely to encounter. People and places -Physical geography - Floods Learning Points Flooding is more likely to occur after periods of heavy rain. Floods can happen suddenly, causing extensive damage to property. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.