In the early hours of July 22, chaos was erupting in Nova Scotia. Rain was pouring down, causing intense flooding. People were panicked about whether to stay or leave their homes. Emergency crews were overwhelmed. In the end, four people died in the floods.A series of radio calls made between one volunteer fire department and the emergency dispatch provide a glimpse into when and how things unfolded that night. They also raise questions as to why it took officials almost two hours to issue an emergency alert with instructions to shelter in place.Lindsay Jones is the Globe’s Atlantic Canada reporter, based in Halifax. She has gone from covering wildfires to floods and is on the show to go through what we’ve learned in the weeks since the fatal flooding.Questions? Comments? Ideas? Email us at thedecibel@globeandmail.com