Adaptation to climate change is at play in cities: this is how the 3-30-300 rule can help us adapt and be more resilient in this new situation. On May 5, 2023, the World Health Organization (WHO) officially announced the end of the health emergency for Covid-19. The virus has not disappeared, but we have equipped ourselves with the necessary tools to manage it, thus overcoming the emergency phase. The same cannot be said about the climate emergency. On the contrary, the year we are experiencing in Italy could be remembered as a year in which the climate crisis did not just knock on our door, but broke it down with arrogance. Then we had to deal with very intense rains that, although not directly related to climate change, still found the soil dry, less able to absorb water and caused catastrophic flooding in Emilia-Romagna. Then came the heat wave that hit southern Europe in July, an event that was said to be virtually impossible if humans weren't warming the planet by burning fossil fuels. This phenomenon is even more disturbing if we take into account that in those days a study was published in Nature Medicine, which attributed more than 60,000 deaths in Europe to the summer of the previous year (including 18,000 in Italy) linked precisely to heat and heat waves . (Redazione Green Planner)