There are questions about whether the region was really prepared for a shutdown of this scale.
A former consultant at the San Onofre power plant explains how the blackout could have spread so far.
For the past few decades, land managers have been trying to eradicate the non-native tamarisk bush. Most recently, they turned to another a non-native species – a leaf beetle - which may be causing more problems that it's solving.
Car crashes are disproportionately high in rural parts of Texas, California and Arizona according to a recent report by TRIP, a national non-profit research group.
Researchers are seeing the trend across the Southwest, including Arizona, California and New Mexico.
Nearly two-thirds of the guns are believed to be in Mexico and at least one weapon has been connected to the death of a border patrol agent.
After their parents' were deported, 16 American children moved to an impoverished Guatemalan town. Their future in both countries remains uncertain. It's the final story in our series, "Life After Deportation."
Arizona lawmaker Steve Smith says he's raised about $200,000 in the first month of his web-fundraising campaign. This might be enough for about 270 feet of fencing.
Arizona has sued the federal government to get out from certain provisions of the civil rights era law. It is one of a handful of states, counties and towns that has to get federal approval to enact changes to their voting law.
A study by Arizona State University’s Morrison Institute finds that the widespread perception that Phoenix and Tucson are facing a water crisis may be overstated.