Rubuta ci gaba don wannan sakin layi - Babban ambaliyar ruwa ya faru a Iowa a 1851, 1892, 1965, 1993, 2008. Babbar ambaliyar ruwa ta 1851 ta mamaye dukkan Iowa, kuma kusan ta lalata sabon garin Des Moines. "Kogunan Des Moines da Raccoon sun tashi zuwa wani tsawo da ba a taɓa gani ba, sun mamaye dukan ƙasar da ke gabashin kogin Des Moines. An lalata amfanin gona, gidaje da shinge". Bayan da aka halaka garin Dudley, waɗanda suka tsira suka ƙaura zuwa wani wuri mai tsawo suka kafa garin Carlisle. Ambaliyar 1851 ta samar da matakan rikodin akan Kogin Iowa a Iowa City da Kogin Cedar a Cedar Rapids wanda ya tsaya har zuwa ambaliyar Iowa na 2008. Ambaliyar ruwa na 1892 ta hallaka yawancin Sioux City. Ambaliyar ta 1965 ta shafi gabashin Iowa, daga Cedar Rapids zuwa Dubuque, tare da biranen da ke kusa da Mississippi mafi wahala. Ambaliyar ruwa ta 1993
sun bazu ko'ina a tsakiyar yamma, suna haifar da babbar lalacewa ga Coralville da Iowa City.