An emergency stands for urgency — something inside that is calling for attention right now. Dream books read it as pressure that has built quietly and now insists on being dealt with.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.