CRESTON, Iowa (AP) — The Creston police chief says tornado sirens didn’t sound before a strong storm swept into town, damaging a hospital and community college. Paul Ver Meer says there was no warning before an apparent tornado hit Saturday evening, and the first he knew that the city was at risk came from a call from Greater Regional Medical Center. The hospital sustained roof damage and had its windows blown out by storm. Southwest Community College also suffered damage but the extent wasn’t known.  The school’s website says classes won’t be held there Monday or Tuesday. Ver Meer says Creston was “very lucky” that no one was injured.