At least seven people have been killed in Germany, Poland and the Czech Republic as powerful storms wreaked havoc in parts of central and northern Europe. <br/><br/>Thousands of people in Poland and the Czech Republic are still without power. <br/><br/>The centre of the German city of Hamburg has been flooded. Some rail services were still suspended in parts of Germany after routes sustained damage. <br/><br/>Disruption was also reported on railways and several roads across the Czech Republic. Winds reached 180 kilometres per hour on the country's highest mountain.<br/><br/>