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

Volunteers and emergency workers raced to secure river banks in Poland's historic city of Wroclaw on Tuesday, as nearby municipalities advised residents to evacuate and authorities across central Europe tallied the cost of floods that have wreaked havoc and killed at least 22 people.

As Storm Boris brought devastating floods to central and eastern Europe, skeptics on social media dismissed the role of climate change in making the deadly rainfall more intense. But scientists have established ties between a warmer atmosphere and torrential rain,