WATCH: Hungary braces for what could be the worst floods in a decade

Budapest mayor Gergely Karácsony warned the city risks facing the biggest flood of the decade. Danube water levels are expected to crest at 8.5 metres near the city.

Flood defence measures were taken along 540 kilometres of Hungary's rivers, with a third-degree alert along 200 kilometres, that is according to Hungarian Prime Minister Viktor Orbán. He adds that he approved the opening of an emergency reservoir along the Leitha river.

Traffic restrictions, implemented as a preventative measure, are said to impact the Gyor-Moson-Sopron and Komárom-Esztergom counties bordering the Danube, as well as areas in the Danube bend area.

International train services between Hungary and Czech Republic, Poland, and Germany will also be affected.

Watch the video in the player above to find out more.