Alertes Yiewsley

A band of heavy showers and thunderstorms is expected to move northwards on Wednesday morning. A drier, brighter interlude may follow, but with a chance of further showers and thunderstorms breaking out during the afternoon. Many places will miss these, but where they do occur they may be intense with 20-30 mm rain falling in less than an hour and perhaps 40-50mm in 2-3 hours in a few spots, leading to some surface water flooding. Large hail and frequent lightning are also possible. The showers and thunderstorms will drift northwards and ease during the evening. For further details see weather/warnings-and-advice/uk-warnings Consider if your location is at risk of flash flooding. If so, consider preparing a flood plan and an emergency flood kit. Give yourself the best chance of avoiding delays by checking road conditions if driving, or bus and train timetables, amending your travel plans if necessary. People cope better with power cuts when they have prepared for them in advance. It's easy to do; consider gathering torches and batteries, a mobile phone power pack and other essential items. If you find yourself outside and hear thunder, protect yourself by finding a safe enclosed shelter (such as a car). Do not shelter under or near trees, or other structures which may be struck by lightning. If you are on an elevated area, move to lower ground. Be prepared for weather warnings to change quickly: when a weather warning is issued, the Met Office recommends staying up to date with the weather forecast in your area.