There's been a lot of debate lately about whether this or that extreme weather event - from China to Australia - is a symptom of Global Warming or merely a surprisingly large cluster of normal freak events. Are these disasters the last of the rare disasters or the first of the common disasters? This seems to me to be like asking - whilst under violent assault - whether one's assailant is the familiar local nutter or a scout for the rampaging army of zombie psychopaths that are on their way to ravage your neighbourhood but at present are still some miles away enjoying a breakfast of griddled brains in a nearby town. The fact of imminent zombie invasion should surely be focusing our minds rather better than it is. But the general consensus seems to be that, untill our shopping malls are actually being over run with slavering mutants, there is no need for any action that might interfere with the day's business.
Changing the lightbulbs in the mall isn't going to stop an army of zombies. We may need to choose a different battlefield