Based on estimates from local officials, the damage to infrastructure could reach a combined $10 billion in these two countries alone. Poland's finance minister said the $5.6 billion allotted from EU funds would cover some, but not all of the costs to recover from the floods.

A massive floodwave moving across Central Europe is threatening new areas and raising concerns among residents and leaders.

At least 10 people have been killed in some of the worst floods to hit central Europe in decades as Storm Boris sweeps through the region.