Duluth, MN (Northland's NewsCenter) -- City officials and experts tackled the impact of flooding on Duluth area streams today at the Minnesota Pollution Control Agency headquarters. Duluth Mayor Don Ness and Minnesota Public Radio Meteorologist Paul Huttner said future severe weather events, like June's historic flood could pop up more often due to changing climate patterns. Recently, the Duluth City Council approved two 100,000 dollar contacts to assess to extent of flood damage to area streams. Now, Huttner says in Minnesota, extreme rain fall events are occurring more commonly, pointing to the fact that three inch rain fall events have doubled in frequency since the 1960's. He says that the majority of climate scientists point to human actions changing the weather. "It's almost to a certainty where 97 percent of climate scientists believe that human cause global warming, the increase of greenhouse gases is having an effect," said Huttner. June's flooding caused natural sediment movement to clog the mouths of Duluth's waterways with debris.