By 2050, the Île-de-France region could face up to 30 days of heatwave conditions annually, with temperatures reaching as high as 50°C. The urban heat island effect in Paris exacerbates these extreme temperatures, posing significant health risks and infrastructure challenges. Solutions such as urban greening, sustainable building designs, renewable energy adoption, and comprehensive heat action plans are essential for mitigating these effects. Collaboration between local governments, the private sector, and communities will be key to creating a more resilient, sustainable urban environment in the face of climate change.