No. Don't take to heart everything you hear on the news or Al Gore. They intentionally try to scare you into believing that we're in such a crisis, the only way to fix the problem is to do what they say by either paying more in taxes, limiting how much you travel, forcing you to buy "green" products. . . These people are called alarmists because they want you to be scared. Global warming is not as clear cut as people like that would have you believe. Despite what anyone says, there is still debate to what causes it and to what extent.
As far as the weather and natural disasters, they will happen. Because they've always happened, so they will continue long after we are gone to happen. People like to think that before humans were here, the earth was this magical place where weather and climate were always the same for ever and ever. Well, it wasn't. It's changed before, and will change again.
Do some reading on the subject for yourself. It's really more to the debate than you think.