Flooding forces people from homes in some parts of Iowa while much of US toils again in heat

Floodwaters have forced people out of their homes in parts of Iowa, the result of weeks of rain. Meanwhile, much of the United States is longing for relief from yet another round of extraordinary heat Saturday. Sirens blared after midnight in Rock Valley, Iowa. People in hundreds of homes were told to get out as the Rock River could no longer take rain. Elsewhere in the U.S., the miserable grip of heat and humidity continues. The National Weather Service says roughly 15 million people are under a heat warning while another 90 million are under a heat advisory.