It looks like a waterfall inside a tunnel.

A strong torrent of water pours continuously over the subway tracks.

Recently, record-breaking torrential rain hit Barcelona, Spain, flooding downtown subway stations.

With roads blocked in various places, public transportation operations have also faced disruptions.

Spain suffered heavy damage from its worst heavy rain in 25 years earlier this year as well.

Experts warn that as global warming intensifies, such natural disasters could break worst-ever records.

(Photo: Instagram @elnacionalcat, @ageofcollapse)