The purpose of this article is to present contemporary climatic changes in their actual scale, and to assess their impact on functioning of urban areas situated on the Polish coast. The results of the analysis of variability of hydro-climatic conditions that occurred in the last 65 years (1951-2015) in the area of the Polish coast suggest that important changes were concerning: (1) temperature of the air, and thickness and length of the occurrence of the snow cover, (2) sea surface temperature, and thickness and length of the occurrence of ice cover, (3) sea level rise during storm surges. It was found, however, that the occurrence of catastrophic fl oods from precipitation in the Tri-City area is not the result of climate change, but it is caused by local conditions. The observed increase of air temperatures, and average sea surface temperatures in the Southern Baltic has generally a positive impact on functioning of coastal cities, and does not need any complex adaptation plans to climate changes. Summer is the only period in which the increase of temperature infl uence cities negatively, due to strengthening the urban heat islands. In this case, the architectural solutions, that require large amounts of energy should be eliminated. In urban planning scale, the solutions helping to cool the space in between buildings should be implemented. Sea level rise in the years 2009-2015, caused by storm surges, should be regarded as a signifi cant change in the climate of the Southern Baltic Sea. Taking these changes into account maps of hazard and flood risk, developed in an ISOK project, should be the basis for detailed records in Study of Conditions and Directions of Spatial Development and local development plans of cities, determining the rules and restrictions of the investment and management in the areas at risk of flooding.
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