I remember it well. Thank you for starting a thread.
I was working in Brisbane that day and at lunch time it was getting thicker and there were a few enterprising kids were being escorted out of Queen Street mall by security, because somehow they had got hold of a load of face masks and they were selling them in the Mall for $1 each. Young enterprise at its best.

I got home back to Cabo and it was much thicker and I had left the doors open and the fly screens shut and there was dust all inside the house. Even the cat had red feet and there were cat foot prints all over the floor. Sadly I never took any photographs that day.