Excerpts from abc7chicago.com:

Riverside firefighters responded to a structure fire in the 200-block of Quincy Street around 12:23 a.m. Wednesday. The blaze started in the rear of the building before spreading to the front. Two adults and two children were inside at the time of the fire but they were able to escape safely before responders firefighters arrived. Firefighters then rescued four dogs that were still inside and used pet oxygen masks to revive them, all of which were transported to a local animal hospital.