What the hell are you taking about? Did you come here from an alternate reality in a time machine? Maybe a Delorean?
Seriously. Unless you live inside the eye of a hurricane, you're not going to see devastating effects like that from global warming. You just probably saw a freak thunderstorm. Probably influenced by the effects of global warming... but its still to early to tell. Things won't get so chaotic due to warming yet. Give it a few years.
What you will see is weird weather patterns. Increasde precipitation in different areas of the world and drought in others. (like in Australia) Warmer oceans mean more typhoons and hurricanes (like in the States, Germany, UK, Canada... we're all getting hurrincanes now. Small ones, but its a start.) . Most will be stronger than in previous years and so forth.
Hell won't rain down on earth yet, but the weather still does damage to human settlement (2-3 billion in damage in Germany from some freakin wind... honestly) and will greatly affect economies if it gets bad enough, especially in countries that depend heavily on exports of food and such.