Ciechanów, like every city in Poland, is struggling with the effects of dense housing, industrial and service development. Intensive construction and sealing of permeable and biologically active surfaces cause an increase in surface drainage, overload of sewerage and receivers, rivers and problems with flooding. This trend is compounded by increasingly frequent extreme climatic events, primarily floods, but also droughts. The situation is becoming bipolar, once there is too much water and in a moment there is not enough. The result is serious economic losses, reduced comfort of life, and sometimes a threat to the life and health of residents. To reverse this unfavourable trend, the city continues to create ‘green-blue’ infrastructure for rainwater retention. Under this slogan are properly designed rain gardens, a park, open retention reservoirs - natural and artificial, as well as the deconcrete of the square in the city center. At the same time, we combine various functions within the planned project. In addition to the basic, for which the project is created, also the function of collecting and managing rainwater or infiltrating it, preventing the formation of heat islands, increasing biodiversity, and at the same time improving the aesthetics and areas undergoing development. An integrated approach to urban infrastructure development will help to minimise the impact of built-up areas on the natural environment. The project aims to increase Ciechanów's resilience to adverse weather events by 31.12.2025 through the implementation of 4 complementary tasks. The specific objectives to be achieved by 31.12.2025 are: 1) increasing biologically and hydrologically active areas by 24,868.61 m2 2) reducing the effects of the occurrence of urban heat islands, by deconcrete 1550 m2, increasing land absorption and water management in urban catchments 3) natural revitalization, including restoring degraded green areas and water reservoirs to their original functions or granting new natural functions, using their potential. Comprehensive measures are planned to adapt the city to extreme weather conditions and to mitigate the urban heat island effect by managing rainwater in urban catchments and developing areas covered with greenery. The scope of activities of the project includes: 1) Reconstruction of a water/retention reservoir with a capacity of 4345m3, which will serve as a storage for rainwater and meltwater for nearby areas; 2) Development of the John Paul II Square on the basis of the PFU based on the winning architectural concept, assuming the dismantling of part of the existing surface and replacing it with vegetation; 3) Revaluation of the historic Jarosław Dąbrowski Park by replacing and supplementing vegetation; 4) Making rain gardens in the form of absorbent discounts in two locations in the city of Ciechanów. The project will increase the area of green areas in the city of Ciechanów. A wide range of activities, including the deconcrete removal of the city's central square, the creation of rain gardens, the development of green areas, the creation of a retention reservoir, will contribute to the promotion of the city's regeneration and air exchange system. Resident-friendly places with health and recreational functions will improve their quality of life. The idea behind the project is to make Ciechanów more resilient to climate change, to function like a sponge. The whole area of the project: 25.971.61 m2.