Floods in Iowa have forced residents to evacuate their homes as Governor Kim Reynolds declares a disaster in 21 counties in the northern part of the state. The flooding, caused by weeks of heavy rain, has led to people being rescued by boat in some areas. In Rock Valley, Iowa, with a population of 4,200, sirens sounded at 2am as the Rock River reached dangerous levels due to the relentless rain. Hundreds of homes were evacuated, and the city faced a shortage of running water as wells became unusable. Meanwhile, much of the US is experiencing extreme heat, with many people longing for relief from the scorching temperatures. The combination of floods in Iowa and the heatwave in other parts of the country has created challenging conditions for residents.