Abstract
Global climate change is a problem which arises numerous theories and uncertainties, especially in terms of speculated human impact. Independent from the fact, what is the main driver for the changes, some of the climate shifts are visible already nowadays. Both contemporary and future cities will have to face such problems. Although climate change may cause numerous effects on different fields, a special stress in this article is laid on hydrological events – which are possible to observe even in these days. The purpose of this article is to indicate the main approaches both to the issue of climate change and activities undertaken by cities in relation to hydrological threats.