[1] Poland's Prime Minister Donald Tusk informed the Sejm that ongoing flooding was "the worst natural disaster in the nation's history ... without precedent in the past 160 years".

[4] The Auschwitz-Birkenau State Museum was closed[5] and important artifacts were moved to higher ground as floodwaters approached.

[3] Wrocław, where the level of the Oder river on 22 May reached 665 cm in Trestno, declared a flood alert.

Reports stated that 22 villages in the Płock area had sustained flooding or were under imminent threat.

[11] In the Lublin Voivodeship, 800 people had to be evacuated after the river Chodelka flooded in the Gmina Wilków.

In the Lesser Poland Voivodeship, another flood alert was announced on 2 June in relation to Kraków, Tarnów, the counties of Bochnia, Brzesko, Dąbrowa, and Sucha, and eight gminas.

[4] In Borsod-Abaúj-Zemplén County, Northern Hungary eighteen towns and villages were cut from the outside world by the flood of the rivers Sajó, Hernád and Bódva.

[23] Several roads became unusable; the border checkpoint of Sátoraljaújhely/Slovenské Nové Mesto was closed on June 1.

[24] In Pásztó (Nógrád county), a local reservoir threatened to overflow; the earthen dam was strengthened by sandbags.

[28] The flood claimed several casualties in Hungary too: a man, whose house collapsed on him, died in Miskolc,[29] while a woman died and two other persons suffered injuries in a car crash in Fejér county, where a car slipped on the flooded road; also in Fejér county a tree fell during the heavy rain, hitting a man who suffered life-threatening injuries.

[3] France, Germany, Lithuania, Latvia and Estonia arrived on 20 May, as well as the Czech Republic, despite that country being affected by the floods too.

[3] On 25 May 2010, Poland received help also from Russia (including 18 high-power pumps, 34 boats and 5 mobile power stations).