"When it rains, it pours," especially when it comes to best-selling author Doug Lennox's Now You Know Extreme Weather. Global warming, killer hurricanes, murderous tornadoes, melting permafrost -- weather concerns us all, and now with this tightly packed compenium of questions and answers, everyone can get the lowdown on things like: What makes a perfect storm perfect? Where's the world's hottest place? Why was Hurricane Katrina so destructive?