Already we are seeing some ominous signs that Dust Bowl conditions are starting to return to the region. In the past couple of years we have seen giant dust storms known as “haboobs” roll through Phoenix, and 6 of the 10 worst years for wildfires ever recorded in the United States have all come since the year 2000. In fact, according to the Los Angeles Times, “the average number of fires larger than 1,000 acres in a year has nearly quadrupled in Arizona and Idaho and has doubled in every other Western state” since the 1970s. But scientists are warning that they expect the western United States to become much drier than it is now. What will the western half of the country look like once that happens?
In a recent National Geographic article contained the following chilling statement…The wet 20th century, the wettest of the past millennium, the century when Americans built an incredible civilization in the desert, is over. Much of the western half of the country has historically been a desolate wasteland. We were very blessed to enjoy very wet conditions for most of the last century, but now that era appears to be over. To compensate, we are putting a tremendous burden on our fresh water resources. In particular, the Colorado River is becoming increasingly strained.
Ecosystem crash: Without the Colorado River, many of our largest cities simply would not be able to function. The following is from a recent Stratfor article: “The Colorado River provides water for irrigation of roughly 15 percent of the crops in the United States, including vegetables, fruits, cotton, alfalfa and hay. It also provides municipal water supplies for large cities, such as Phoenix, Tucson, Los Angeles, San Diego and Las Vegas, accounting for more than half of the water supply in many of these areas.” In particular, water levels in Lake Mead (which supplies most of the water for Las Vegas) have fallen dramatically over the past decade or so.
The following is an excerpt from an article posted on Smithsonian: “And boaters still roar across Nevada and Arizona’s Lake Mead, 110 miles long and formed by the Hoover Dam. But at the lake’s edge they can see lines in the rock walls, distinct as bathtub rings, showing the water level far lower than it once was—some 130 feet lower, as it happens, since 2000. Water resource officials say some of the reservoirs fed by the river will never be full again.” Today, Lake Mead supplies approximately 85 percent of the water that Las Vegas uses, and since 1998 the water level in Lake Mead has dropped by about 5.6 trillion gallons. -TECB