Dr. Francis Zwiers, Director of the Pacific Climate Impacts Consortium and IPCC coordinating lead author of the Fourth Assessment Report, discusses “changing weather extremes” – a topic that is also the title of a free public lecture that he will be giving at the upcoming CMOS congress, on June 6th. His very well-informed thoughts on how the climate is changing, what weather extremes we might expect in Canada as a result, some of what brought us to this point, and what the future looks to hold, are crucial messages that we all need to listen to, and take action on.