Global temperature increase to escalate possibility of heavy rainfall events, say scientists Scientists have long said that climate change will lead to heavier downpours. But determining its role in last week's relentless downpours will take at least several weeks to research Floods always happen, and they are like random events, like rolling the dice (Source: Reuters) Reuters Updated Jul 19, 2021, 11:03 AM IST The extreme rainfall causing deadly flooding across western Germany and Belgium has been so alarming, many across Europe are asking if climate change is to blame. Scientists have long said that climate change will lead to heavier downpours. But determining its role in last week's relentless downpours will take at least several weeks to research, scientists said on Friday.