Using a web mapping service (WMS), you can view alternate images in Google Earth. These appear as image overlays. This lesser known feature set allows you to display this information from any publicly available WMS. To do this, follow these instructions.
Available information from a WMS can include weather, geological features, seismic hazards, population depictions, time zones, forestry regions and much more.
Tip: Before you begin exploring WMS offerings in Google Earth, be sure to zoom in to the particular area on the globe that you want to explore. This improves performance and lessens the demand on the WMS servers that generously provide this free information.