Ah laptop yes that makes it more difficult. Desktops run much cooler overall because you can get much better heat dispersal than with a laptop. You also have many more options with desktops.
Having done some research the GT 330M is actually not built to run anything in DX11 at all. Its driver support may extend there now but that may be the big reason why you're getting so much heat off it - its working VERY hard to deliver performance under those settings. (It was a dx10.1 mid range card)
So on that note how is the heat when running in DX9? If it is still running very hot you may want to consider picking up a laptop heatsink (just a stand with or without a fan in it that the pc sits on top of and pulls the heat away, whether by using the fan or just by being a big chunk of cold metal to spread the heat out) It is very bad for the life span of the hardware to be running so hot for extended periods of time (this is why it forces itself to shut down so as to prevent it from damaging itself) as the hardware WILL begin to melt.
Also check what settings you are running Civ on - the GT330m is recommended to run dx11 games on medium detail settings and resolutions rather than high settings - so if your settings are cranked then consider dropping back a bit to give the gpu an easier time keeping up with the game.
Only other thing is if it is very hot make sure you use it on a table rather than your lap as extended exposure to the high heat is very bad for your body. It is also possible that the fabric of your clothing is blocking the air vents when you use it - they really prefer flat surfaces for use.
If none of that helps then you can keep your disc drive (dvd/blu ray, whatever is on there) open to encourage air flow. It helps more than you'd think but is often annoying (and careful cuz they break easy when they're open). It may come down to cleaning out the dust - you would use a can of compressed air so it's not that difficult.
Summary
a) check settings, check temps running in dx9 with (possibly) revised settings
b) Possibly acquire laptop heatsink (I prefer with fan if you get one)
c) Possibly clean out dust. (theoretically you want to do this every 3-6 months anyways)
Sidenote: Is it a thin laptop? Thin laptops often run much hotter, much quicker because there is so much less natural heatsink for dispersal. Thin and portable comes at a price
lmk how it goes.