Overview
- The Met Office and Met Éireann say the short, record late‑May heat has finished and this week will be cooler with widespread rain and showery, sometimes thundery conditions across the UK and Ireland.
- Forecasters warn temperatures will fall sharply from last week’s highs, with some areas around 14°C cooler than during the heat, and many places returning to near‑average values for early June.
- Heavy, electrically charged downpours could fall on dry, baked ground and run off quickly, creating a real risk of localized flash flooding where storms train over the same areas.
- U.S. regional forecasts show contrasts: New England and much of the interior will start cool then warm with rising thunderstorm chances later in the week, while the Gulf and southern coast face sustained heat, daily storms and pockets of heavy‑rain flood risk.
- Meteorologists stress short‑range model uncertainty and urge people to follow local watches and warnings because timing and intensity of heavy showers and thunderstorms will vary county by county.