The wave of unusual disasters this summer now includes Hurricane Lee, a storm that swelled from Category 1 to Category 5 in just 24 hours as it barreled toward Canada. It’s a prime example of rapid intensification made worse by warming ocean temperatures. It will add to what’s already been an exceptional year of extreme weather. The US has set a new record for the number of billion-dollar disasters in a year — 23 so far — in its history, according to the National Oceanic and Atmospheric Administration (NOAA). And this doesn’t even include the costs from Tropical Storm Hilary in California or from the ongoing drought in the South and Midwest, because those costs have yet to be fully calculated.