Helicopters scramble to rescue people in flooded Iowa town

Floodwaters forced people out of their homes in parts of Iowa, the result of weeks of rain, while much of the United States longed for relief Saturday from yet another round of extraordinary heat.Sirens blared at 2 a.m. in Rock Valley, Iowa, population 4,200, where people in hundreds of homes were told to get out as the Rock River could no longer take rain that has slammed the region. The city lacked running water because wells were unusable.Mayor Kevin Van Otterloo said a state helicopter…