For some areas, the German Weather Service has forecast heavy showers or storms, bringing between 30 and 40 litres per square metre.
Amid further rainfall on Saturday afternoon, evacuation services to emergency accommodation were offered to communities in Rheinland-Palatinate who had been particularly badly affected by the flooding, German news site Merkur reported.
“The people will have to make the decision themselves,” said Begona Hermann, head of the relief teams in the west German state, explaining that the forecast rainfall was not expected to be as severe as that which devastated parts of Germany last week.
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However, even lower levels of rainfall could still be a problem because sewage and drainage systems were not working properly because of the flooding.
Earlier on Saturday, police requested all volunteers working on the clean-up operation in the Ahr area to leave as quickly as possible for their own safety because of the difficult conditions.
This came after the police and the crisis management team asked the public not to travel to Rhineland-Palatinate to help out because there were too many people there.
“The population’s willingness to help continues to be undiminished and overwhelming,” read a Kassel police statement on Saturday. Due to the large number of volunteers who came to help out, however, roads in the area are now congested, it said.
Heavy machinery required for road and bridge construction, and for the restoration of the area’s water supply, was getting stuck in traffic jams, the press release said.
Vehicles for removing rubbish and construction debris, as well as emergency and rescue vehicles, were also unable to get through.