There is more flash flooding, partly caused by climate change. Parts of London and the south of England were left under water and roads became impassable this week. Just 30cm of water is enough to move a car. Infrastructure and transport networks were damaged. London hospitals asked patients to stay away after they lost power. Urban areas experience ‘surface water’ flooding because they have a lot of hard surfaces - paved front gardens, car parks, roads and high streets. On 28 July several towns in Scotland were flooded, with more to come. https://www.bbc.co.uk/news/uk-scotland-57970845 Reading University says urban areas could benefit from permeable pavements and green roofs which can help rainwater to soak away rather than causing floods. Weather and flood forecasting has improved rapidly, and it is now possible to forecast surface water flooding events in advance.