How to visualize trending over geographical area? I would like to visualize how a percentage evolves in time over a geographical area.

In particular I have the percentage of products delivered in different regions and I want to show the weekly trend for each of the 21 regions. Currently I show a heatmap with the values of the current week and three line plots showing the trends of the 3 worst regions. I would like to show the full picture. Unluckily I can't use animations as I have to put the visualization on a static powerpoint.

I'm working with d3, sql and excel.
Any idea?
Overly simple answer: "animate" this in PowerPoint by having one slide per time slice then advancing the slides quickly with the keyboard or set them to auto-advance.

If you have a little more flexibility outside PPT, there are free tools (e.g. Microsoft Power BI) where you could do a shaded map and have a time slider to make it more interactive.