So if you were to cut(repairable/splice) the 'orange' overheated wire and install a new fuse , what are you missing?
Do you still see smoke?
Does the key release?
What is missing from normal operation?
As Avguy commented , there could be an issue within a bundle/short (which can be a nightmare) but if you can isolate the problem to a wire/sensor/lamp/fan/etc you may be able to eliminate some troubleshooting paths (not to say that the overheated wiring hasn't added to this problem).
You may be able to systematically narrow down your 'wire tracing' to a specific wire in a bundle and follow that path.
Mine is an 05 Aveo and I can pull the 30 amp FANHI fuse without any issue for starting/driving (yeah, it'll overheat) but this is probably a separate issue (perhaps an idea of the wiring status on your vehicle).
The EMS1 fuse is eerily familiar to some recent posts over the past few months.
Anyone on the Forum have an 09 wiring diagram related to the EMS1 fuse and the components it protects?
If so, you could try and isolate all of them, and bring them back one at a time and see which culprit is causing the issue (hoping of course no other damage has incurred), It could be an easy resolution, hoping that one system isn't reliant on another (that's were it gets sticky).
Cheers
Just seen the TSB link posted by avguy, good info (hoping I wont need it!)
cheers