Firefighters say the fire was confined to the second floor of the building.
The injured are being treated at area hospitals.
Animal Welfare President Kelly Day says all the cats survived the fire, but about a dozen cats escaped when firefighters opened the door.
Volunteers are looking for the missing cats.
------Waterloo Technical Society celebrates 100 years
CEDAR FALLS, Iowa (AP) — Gary Dorhout was asked to speculate on what the first gathering of the Waterloo Technical Society might have discussed.
"Might have been Wilbur and Orville Wright," said Dorhout, the organization's president. "It would have been the technologies that were prevalent at the time."
It was a long time ago. When the group held its most recent monthly meeting in its usual venue, the restaurant of the Clarion Inn in Cedar Falls, it marked the start of its 100th year as an organization.
The Waterloo-Cedar Falls Courier reports (http://bit.ly/1gMHkw3http://bit.ly/1gMHkw3 ) that in fall 1914, about 20 engineers & technical men in Waterloo launched the Waterloo Technical Society as a nonprofit organization whose focus was to discuss the latest advancements and theorize on its implications for the future.
The inaugural group of engineers and technically trained men from various fields of expertise took on new members at a steady pace, reaching a peak of about 500 members during the 1950s.
Over the last 30 years, membership has settled back in the 60-80 range, Dorhout said.
Today, there are about 50 members, primarily with engineering backgrounds.