ROME (AP) — Exceptional rains Wednesday in a drought-struck region of northern Italy swelled rivers over their banks, killing at least eight people, forcing the evacuation of thousands and prompting officials to warn that Italy needs a national plan to combat climate change-induced flooding.

The heavy rains also forced Formula One to cancel this weekend’s Emilia-Romagna Grand Prix to not overtax emergency crews that were already stretched thin in responding to the rivers of mud that have torn through the region, wreaking havoc on infrastructure and homes.

Days of rainstorms stretched across a broad swath of northern Italy and the Balkans, where “apocalyptic” floods, landslides and evacuations were also reported in Croatia, Bosnia and Slovenia.

The vice president of Emilia-Romagna, Irene Priolo, said eight people were killed and others unaccounted for in flooding that forced the evacuation of more than 10,000 people.

Italian Civil Protection Minister Nello Musumeci called for a new nationwide hydraulic engineering plan to adapt to the impact of increasing incidents of floods and landslides. At a briefing, he noted that an average of 200 millimeters (7.9 inches) of rain had fallen in 36 hours in the region, with some areas registering 500 millimeters (19.7 inches) in that period.

"If you consider that this region averages 1,000 millimeters (39.3 inches) of rain in a year, you realize the impact that these rains have had in these hours," Musumeci said.

Citing the November landslide in Ischia, which killed a dozen people, he said that Italy is increasingly experiencing Africa-style tropical weather, with long periods of drought punctuated by intense rainfall that can't be absorbed by the soil.

“Nothing will ever be the same again ... and what has happened in these hours is evidence of that," Musumeci said. "When soil remains dry for a long time, instead of increasing its absorption capacity, it ends up cementing and allowing rainfall to continue flowing over the surface and causing absolutely unimaginable damage.”

The mayor of the city of Cesena, Enzo Lattuca, posted a video early Wednesday on Facebook to warn that continued downpours in the Emilia-Romagna region could flood the Savio river and smaller tributaries for a second day. He urged residents to move to upper floors of their homes and avoid low-lying areas and riverbanks. He announced the closure to traffic of some bridges and streets after rivers of mud sloshed into basements and storefronts.

Musumeci said 50,000 were without electricity, and more than 100,000 were without cellphone or landline use.

The deputy chief of the Civil Protection agency, Titti Postiglione, said that rescue operations for those needing emergency evacuations were particularly difficult given so many roads and routes were flooded and phone service interrupted.

Some regional train routes remained suspended Wednesday around Bologna and Ravenna, with severe delays elsewhere, the Italian state railway said.

Premier Giorgia Meloni, who was traveling to the G-7 meeting in Japan, said the government was monitoring the situation and was prepared to approve emergency aid.

In the Balkans, the swollen Una river flooded parts of northern Croatia and northwestern Bosnia, where authorities announced a state of emergency. The mayor of the town of Bosanska Krupa in Bosnia said that hundreds of homes had been flooded.

“We have an apocalypse,” Amin Halitovic told regional N1 network. “We can no longer count the flooded buildings. It’s never been like this.”

Dozens of landslides were reported in eastern Slovenia, many of which endangered homes and infrastructure.

In Croatia, hundreds of soldiers and rescue teams continued bringing food and other necessities to people in flood-hit areas who have been isolated in their homes. No casualties have been reported so far.

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This story has been corrected to show that the last name of the Italian Civilian Protection Minister is Musumeci, not Musemeci. A previous version was corrected to show that Meloni was en route to Japan, not coming home.

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Jovana Gec contributed from Belgrade, Serbia.