Well, that seems to be what the chinese have done now... keeping in mind the chances of having unfavourable weather on the day of the opening ceremony of the olympics. They just shot up a few pellets of silver iodide into the clouds so that they rain out a few days before the olympic celebrations were due to start and don't dampen up the celebrations.
This has become one of the most controversial topics of late.... has man scientifically advanced so much so as to change the weather?? should nature's natural course be tinkered with???
Man has contributed so much to nature namely, pollution, the hole in the ozone layer, made many animals extinct, natural resource depletion, land degradation etc etc etc the list just never ends....
The Indian government can surely take a few tips from the chinese and shoot up a few silver iodide pellets and make it rain whenever there is a shortage of rain. Atleast its for a better cause than not interuppting games :-)
Maybe in time we can change the old proverb to
"every cloud has a silver IODIDE lining" :-P