Overview
- A strong heat dome over the western United States is producing near‑record daytime highs and unusually warm nights that are prompting Heat Advisories and Extreme Heat Warnings across large population centers.
- The hot, dry pattern has raised wildfire danger and helped several large fires grow, with state emergency declarations and red‑flag alerts issued for parts of the Pacific Northwest and the Interior West.
- Cooling centers report heavy demand as vulnerable people seek relief, and public‑health officials warn warm overnight lows limit physiological recovery and increase heat‑illness risk.
- The United Kingdom is facing a short renewed heatwave with Met Office forecasts of around 34–35°C and UKHSA amber heat‑health alerts for London, the South East, East of England and East Midlands.
- Forecasts show a modest midweek cooldown from a weak front or onshore flow followed by a likely ridge rebuild that could return high heat, keep fire and health stresses elevated, and limit widespread rainfall relief.