Heavy rainfall in the north-west of the Sauerland region in North Rhine-Westphalia has led to numerous fire brigade and rescue service operations.
In the early hours of the night there were 480 operations in the Märkisch district, said a spokesman for the district control center early on Friday morning.
The fire brigade had to pump out flooded basements.
According to initial reports, there were no injuries.
The Märkische Kreis had previously warned of flooding due to overflowing streams and smaller rivers and flooding of streets because of the constant rain.
In Solingen, where there was a flood alarm during the night, the situation on the Wupper stabilized again.
More rain on Saturday night
The German Weather Service (DWD) predicted windy and stormy weather for North Rhine-Westphalia on Friday morning.
Occasionally short thunderstorms with gusts of wind are also possible.
The DWD also expects further showers on Saturday night, before there will be heavy and prolonged rain again during the day.
According to the information, the focus of the operations in the Märkisch district was the Oberbrügge district of Halver.
The Volme River has meanwhile burst its banks.
The situation relaxed again during the night.
The fire brigade averted considerable damage with sandbags and pumps, district fire chief Michael Kling was quoted as saying.
The authorities had previously called on people living on the Volme not to stay in the lower floors or basements of their homes.
They should also disconnect the electrical appliances there from the power supply.
Those who wanted could also stay in the community center of the district.
In the meantime, around 30 people had sought refuge there.
But that was just a precautionary measure.
On Thursday evening, several roads in the cities of Altena and Kierspe were closed due to the rapidly rising water levels in the Lenne and Kerspe rivers.
The German Weather Service had warned of heavy continuous rain and possible flooding for individual administrative districts in North Rhine-Westphalia.
The warning was lifted early Friday morning.