Italy’s deadly floods just latest example of climate change’s all-or-nothing weather extremes

ROME (AP) — The floods that sent rivers of mud tearing through towns in Italy’s northeast are another drenching dose of climate change’s allor-nothing weather extremes, something that has been happening around the globe, scientists say.

The coastal region of Emilia-Romagna was struck twice, first by heavy rain two weeks ago on drought-parched ground that could not absorb it, causing rivers to overflow overnight, followed by this week’s deluge that killed 14 and caused damages estimated in the billions of euros.

In a changing climate, more rain is coming, but it’s falling on fewer days in less useful and more dangerous downpours.

The hard-hit EmiliaRomagna region was particularly vulnerable. Its location between the Apennine mountains and the Adriatic Sea trapped the weather system this week that dumped half the average annual amount of rain in 36 hours.

“These are events that developed with persistence and are classified as rare,’’ Fabrizio Curcio, the head of Italy’s Civil Protection Agency, told reporters.

Authorities on Friday said that 43 towns were impacted by flooding and landslides, and that more than 500 roads had been closed or destroyed.

Antonello Pasini, a climate scientist at Italy’s National Research Council, said a trend had been establishing itself: “An increase in rainfall overall per year, for example, but a decrease in the number of rainy days and an increase in the intensity of the rain in those few days when it rains,” he said.

Italy’s north has been parched by two years of drought, thanks to lessthan-average snowfall during the winter months. Melting snow from the Alps, Dolomites and Apennines normally provides the steady runoff through spring and summer that fills Italy’s lakes, irrigates the agricultural heartland and keeps the Po and other key rivers and tributaries flowing.