It's a big step in fire communications ? the biggest upgrade that's been undertaken in at least 25 years.

The roof was being worked on and the fire began on the roof. That's what we know.

The Chicago Fire Department has ruled the cause of the fire undetermined. The amount and type of flammables within the structure make it difficult to determine what did or did not contribute to the start and spread of the fire. If new information becomes available, the department will review its findings.

It was definitely a lot of her playfulness, wit and fire that I tried to put into the piece. She was such a great supporter of the arts, so I wanted to do something to reflect that energy she had.

People were talking over each other, and they couldn't hear because radio traffic was so heavy. With the new system, there will be many more available channels.

These would be new residents. They'd move here.