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| Weather change from heat to rain brings flood warning | Weather change from heat to rain brings flood warning |
| (about 3 hours later) | |
| Weather forecasters are warning of a dramatic break in the current heatwave with heavy rain overnight and early on Tuesday bringing flash floods. | Weather forecasters are warning of a dramatic break in the current heatwave with heavy rain overnight and early on Tuesday bringing flash floods. |
| Isolated thunderstorms are expected to hit parts of north east Wales on Monday evening with downpours likely to make driving conditions difficult. | Isolated thunderstorms are expected to hit parts of north east Wales on Monday evening with downpours likely to make driving conditions difficult. |
| Showers will spread across Wales overnight and the heat will trigger more thunderstorms in the morning. | Showers will spread across Wales overnight and the heat will trigger more thunderstorms in the morning. |
| It is likely to remain humid though temperatures will be slightly lower. | It is likely to remain humid though temperatures will be slightly lower. |
| The Met Office has issued a rain warning for England, Wales and southern Scotland. | The Met Office has issued a rain warning for England, Wales and southern Scotland. |
| The yellow alert covering most of Wales, apart from the far west and Pembrokeshire, is issued to give people notice that there may be disruptive storms. | |
| The first of the downpours are expected to arrive in the next few hours in parts of north east Wales. | The first of the downpours are expected to arrive in the next few hours in parts of north east Wales. |
| The sun-hardened ground is likely to make it easier for rain water to run off into drainage systems more quickly. | The sun-hardened ground is likely to make it easier for rain water to run off into drainage systems more quickly. |
| People travelling home from work or events like the Royal Welsh Show in Builth Well, Powys, are being advised to be prepared for the change to wet road conditions. | People travelling home from work or events like the Royal Welsh Show in Builth Well, Powys, are being advised to be prepared for the change to wet road conditions. |
| Natural Resources Wales said heavy rain is likely to cause roads to flood and drains, ditches and small streams to overflow. | Natural Resources Wales said heavy rain is likely to cause roads to flood and drains, ditches and small streams to overflow. |
| In a statement, it said: "Those who are camping or caravanning should also keep an eye on the weather conditions and listen to advice from the site owners." | In a statement, it said: "Those who are camping or caravanning should also keep an eye on the weather conditions and listen to advice from the site owners." |
| BBC Wales weather presenter Behnaz Akhgar said the first downpours would be replaced overnight by extended showers moving up from the south into the north and east. | BBC Wales weather presenter Behnaz Akhgar said the first downpours would be replaced overnight by extended showers moving up from the south into the north and east. |
| "These will intensify as the sun comes up. There is a risk of hail and thunder and some gusty winds. | |
| "The rain will fall heavily in some places, with the risk of localised flash flooding, but a couple of miles down the road there might not be anything. | |
| "It will still feel warm but not as warm as it has been today. It will still be humid, perhaps even more humid than today." | "It will still feel warm but not as warm as it has been today. It will still be humid, perhaps even more humid than today." |
| Typically average temperatures in the shade on Tuesday would be 24C (75F) compared to around 28C (82F) on Monday. | |
| The showers should disappear by later afternoon on Tuesday, leading to a settled period once again, she said. | The showers should disappear by later afternoon on Tuesday, leading to a settled period once again, she said. |
| The UK has had its first prolonged heatwave since 2006 - though Saturday was the first day in seven when temperatures did not exceed 30C anywhere in the country. | The UK has had its first prolonged heatwave since 2006 - though Saturday was the first day in seven when temperatures did not exceed 30C anywhere in the country. |
| However, it has not matched a heatwave in the summer of 1976, when temperatures above 32C (89.6) were recorded on 15 consecutive days. | However, it has not matched a heatwave in the summer of 1976, when temperatures above 32C (89.6) were recorded on 15 consecutive days. |