There is a high probability that 50-100 millimeters of rain could fall in Tallinn and the surrounding area this evening and overnight. The heavy rainfall could cause disruptions or overloads in the sewer system.
Urmas Kütt, head of pipeline operations at Tallinna Vesi, recommends clearing leaves and debris from gutters, downspouts and storm drains before heavy rain, closing basement windows and, if necessary, sealing doors through which water could enter a building, particularly if the property is below street level.
He added that, where possible, people should consider installing flood barriers, move valuables that could be damaged by flooding out of basements and avoid parking in underground parking facilities and lots below the surrounding ground level, as the risk of flooding is greater there.
To prevent backflow, Kütt recommended checking that backflow valves are working properly and monitoring basement floor drains and sewer connections for possible backflow. “If the property has a pumping station, check that it is working and, if possible, empty it before the rain. Stormy weather can also cause power outages,” he said.
“During the rain and immediately afterward, people should avoid using large amounts of water, such as for baths, washing machines or dishwashers, to avoid placing an additional burden on the wastewater system. Stormwater should not be directed into the wastewater system through the sewer system, as this can increase the risk of overloading the sewer system and water entering buildings,” Kütt said.
According to Kütt, people should not enter a flooded basement until the risk of electric shock has been ruled out. They should also stay away from flooded areas and open manholes, which may be hidden beneath the water.
“Tallinna Vesi is monitoring the situation and doing everything it can to ensure that water and sewer services continue to operate and stormwater is drained even in difficult weather conditions. Flooding can also dislodge manhole covers in the streets, so we recommend that both pedestrians and drivers remain alert,” Kütt warned.
Tallinn was last seriously flooded in July of 2023 when, in a 24/hour period, around 80 percent of the average monthly amount of rain fell on Tallinn and the city’s infrastructure in some cases proved inadequate to deal with it.
Flooding on Reidi tee in Tallinn, overnight July 25-26, 2023. Source: Tallinn Transport Board traffic camera footage.
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