Geography and urban development of Dresden temperatures are almost the same as those in cities in southwest Germany; on average 10.2°C per year. In hot summers, Dresden is between the hot Lusatia and the milder Ore Mountains. Both regions are characterised by strong winters: temperatures of −20°C are not impossible in Dresden. The driest months are February and March, with precipitation of 40 mm. Spring months have often been arid in the last couple of years (with less than 10 mm of precipitation). The most precipitation falls in July and August, at 60 mm per month. Due to its location on the banks of the Elbe
History of Hamburg to the central government. The German constituent states were replaced in 1935 by regional districts (German: "Gau") led by Nazi Party officials who obeyed the central government's orders. On 16 May 1933 Karl Kaufmann (1900–1969) was appointed as "Reichsstatthalter" (imperial governor or imperial lieutenant) in Hamburg. The Hamburg Senate had resigned in March 1933 and the Hamburg Parliament elected Carl Vincent Krogmann (NSDAP) as mayor. In 1938 the city boundaries were extended with the Greater Hamburg Act to incorporate Wandsbek, Harburg, Wilhelmsburg and Altona. On 1 April 1938 Constitution of Hamburg was suppressed through an Imperial Law (German: "Reichsgesetz"), the