 And there's more at WTOP.com. Climate change has a cost. An insurance group, Aon, says the heat that can warp your roofs, buckle the roads and damage a lot of crops cost at least $100 billion a year and lost productivity. That includes a jump in worker injuries on blistering hot days, injuries to construction workers. For example, they were 20% higher when the temperature climbed above 95 degrees yesterday.