Europe 2026 Heatwave: Deep Research Report

@Doi Produce one complete downloadable Markdown report in English about Europe’s 2026 heatwave, current through 4 August 2026. Use a high-search-intent SEO title, meta description, suggested keywords, answer-first executive summary, clear H1/H2/H3 structure, and publication-ready prose. Cover chronology and geography; records and duration; heat-health effects and vulnerable groups; mortality or excess-death evidence where available; wildfires, drought, agriculture, energy, transport, water, and urban impacts; meteorological circulation; climate-change attribution; government and public-health responses; equity and cross-border implications; the outlook for the rest of 2026; and monitoring priorities. Prioritize authoritative recent sources and reputable event reporting, reconcile conflicting figures, label observations versus forecasts/projections/attribution, state limitations, and include inline sourced charts, maps, or diagrams near the relevant sections with descriptive captions and alt text. Deliver the full report as a Markdown file, not a text-only summary.