My iphone 4 is water damaged,how can I rescue my photos back?

My iphone was half submerged in water for a few seconds,and has ceased to function properly since,it tells me that the temperature is too hot and I need to wait for the temperature to cool down. However, it has been about two weeks since the occurrence and I am due to buy the lphone 5s this month,all I want is to retrieve my many pictures saved on it. The iphone will not sync to the computer or itunes because the computer also alerts me the iphone needs to "cool down", does anyone have any tips on where/or how I could get to the stage of getting the images saved onto a memory stick or computer. Any helpful comment is extremely welcome.