once before on my earlier game, i had only about 6 or 7 people but had fully researched farming - they had such a large supply of food but about 3 times it said a typhoon had come and washed away all my food!

Another time when my population was bigger it said a heat wave came and none of the villagers felt like working. every one ran to the lagoon and ocean to try and cool off. i wish i had taken a screen shot - it looked so funny - even the children who can't swim were walking on water!