Where I grew up in California, USA, droughts are the biggest problem. I was taught to conserve water and brought these habits with me to the other side of the country where I now live in Massachusetts, even though floods are more of a problem here. Last January, the governor of California declared a drought state of emergency (see
www.sfgate.com/drought/ for pictures) after 3 years of below average rainfall. However, it's hard to convince people to use less water. Use has actually increased this year despite calls for reductions due to the drought conditions.