Overview
- A rapid warming trend is building across large parts of the U.S., with inland highs forecast in the upper 80s to low 90s and heat‑index values near 100 in some places.
- Scattered, mainly hit‑or‑miss thunderstorms are expected midweek into the end of the week, and storms that form could drop locally heavy rain that causes ponding on roads and poor visibility.
- Because storm coverage will be spotty rather than widespread, the rain is unlikely to deliver broad drought relief for regions already short of rainfall.
- The Met Office and regional forecasts say low‑pressure, cyclonic systems will keep Britain cooler, windier, and wetter than normal, though some model runs show an uncertain chance of much hotter conditions in parts of England around mid‑June.
- The contrasting weather comes from a split jet stream that lets high pressure and humid air surge north over the U.S. while Atlantic lows hold summer back in the U.K., creating sharply different travel and outdoor‑safety impacts for residents in each region.