Chile has been experiencing extreme flooding, causing at least one declared catastrophe. The impacts of climate change are considered a key factor ramping up the force of the floods. Mikhail Chester, a Fulton Schools professor of civil, environmental and sustainable engineering, talks about the challenges of planning and designing infrastructure to prepare for such potentially calamitous events. Chester says there is growing concern that current infrastructure such as roads, bridges and dams — designed and built for the environmental conditions of the past — won’t stand up to today’s exceedingly extreme weather events driven by changes in the climate. See a video related to the story:  Chile: Rainfall causes deadly flooding in north, catastrophe declared.