France's hottest day on record forces extreme heat. 25% of French homes lack air-conditioning. Building norms prioritized insulation over cooling. Environmentalists view AC as worsening climate change. Marine proposes 'plan clim' for schools and hospitals. Marie Tondelier breaks with 'anti-clim dogma'. Tanguy's $22.7bn loan plan for cooling units. Critics label plan as opportunistic and uncosted. Valerie aims to AC public transport by 2032. Nantes hospital faces scrutiny over limited cooling