Complex sentence: In all, 1,616 stores were damaged in looting and rioting; 1,037 fires were responded to, including 14 multiple-alarm fires; and in the largest mass arrest in city history, 3,776 people were arrested.
Split into simpler sentences: In all, 1,616 stores were damaged in looting and rioting. In the largest mass arrest in city history, 3,776 people were arrested.