I was thinking more that something inside your laptop is WAYyyy too hot.
You should get that checked out at a shop.... one thing I know of is laptop batteries shorting out and causing nasty fires...
this one was staged-- but there have been real ones. They burn at over 1000 Deg F once they get going
one like this occurred at a Japanese business-meeting... you know boardroom/CEO/Many other execs about 2 years ago-- a Sony i believe
The boss was not impressed