Here are some non-fiction books that I've used in my researches and can recommend.
The Unthinkable: Who Survives When Disaster Strikes - and Why. Amazing, a page-turner of a book that might also help you survive a disaster.
Tornado Alley: Monster Storms of the Great Plains Technically complex, but if you've learned everything The Weather Channel has taught you, you might move on to this!
Storm Warning: The Story of a Killer Tornado The personal stories in here were ones I found very touching. It influenced my novel Storm.
The New Madrid Earthquakes, Revised Edition The book on the 1811-12 New Madrid quakes. To some people, the reviews tell me, it was dull reading, consisting as it does of a lot of primary sources, but it's meticulously researched and probably has every primary source in here, everything important that anyone wrote at the time. And I was fascinated by every word.
The Next Pandemic: On the Front Lines Against Humankind's Gravest Dangers. Dr Ali Khan, formerly of the CDC. Fascinating look into the life of a real life disease researcher who responded to infection disease outbreaks all over the world for many decades.
National Geographic Prehistoric Mammals Not much text but gorgeous illustrations by a premier paleoartist. Great for the whole family.