Temperature
Independent article: urban heat island

Populated area tend to exist as significantly warmly than their rural (& even suburban) surroundings, particularly at night. When people centers develop inside size from either village to town to city, it tend to have a corresponding increase witharound typical temperature (which is further typically welcome around wintertime months than in summertime). A United states EPA says: "On hot summer days, urban air can be 2-10°F [2-6°C] hotter than the surrounding countryside." Does'nt to exist as confused using global warming, scientists call for this phenomenon a "urban heat island effect." [http://yosemite.epa.gov/oar/globalwarming.nsf/content/ActionsLocalHeatIslandEffect.html]

Rainfall
Cities sop up great deal less a stream by the square metre than rural areas, as much of the babies is paved or even built in. Around a select few areas this creates a want for specific measures to reduce the chance of localised flooding during periods of heavily rain. Measures include a have of rainwater storage and drainage systems. Around occasionally areas this could require storm sewers to collect rainwater individually from either personal blackwater, to reduce the chance of contaminated water supply overflowing when you took periods of rain impenetrable plenty to overwhelm sewers.

Vegetation
Based on data from of these learn, a growing year around east coast U.s. cities is xv years hanker than in the encompassing rural areas. This is attributed to the heat. [http://www.livescience.com/environment/041026_Urban_Heat_Island.html]