This autumn has seemingly shifted into yet another gear, especially in a rain-weary Europe where massive and deadly flooding in Spain's Valencia region is the latest incarnation.
Scientists trying to explain what's happening, especially with a spate of deadly European downpours, see two likely connections to human-caused climate change.
One is that warmer air holds and then dumps more rain. The other is possible changes in the jet stream that moves weather systems across the globe.
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