We have the same climate as the Philippines here and
seacue's advice works fine for me. My IBM Thinkpad has been plodding away for a couple of years without any problem apart from the fragile power adaptor cable. Keep it well ventilated - fans are fine - and use dessicants in the store cupboard. These can be reactivated easily by baking them in the oven. Use a Honda generator for those irritating power failures.
As to cobras they're OK as long as you don't provoke them. Dogs are bad news when dealing with cobras - they stir them up into a foul temper and then you've got a real problem! Keep at least nine feet back as they can spit venom in your eye from about six feet. Quietly and calmly use a broom to distract them and encourage them to move away in the direction of the door. Seven seconds? Where did you hear that? Cobra bites are seldom fatal to adults, unless they're really annoyed and give a full dose. If bitten you're in trouble for sure but death isn't likely. Now, Russell's Viper is another story altogether...
The jungle is so beautiful, what a pity its disappearing so fast. I suppose that's why we get so many snakes and lizards in our house these days. Not to mention the bloody monkeys!
Maybe I should move back into town? Nah!