Saguaros are a staple in Arizona. It needs just the right balance of heat and rainfall to thrive—too much or too little of either can throw off that balance.

Arizona's national parks offer majestic views, a forest of towering saguaros and a look back into time with a preserved ...

The intense heat in recent Arizona summers is taking a toll on the smaller saguaro cactus. The survival of saguaro seedlings ...