I wish that there was nice temperature (not too cold, not too warm) in Melbourne FOREVER.
Your wish is granted, but the perfect temperature doesn't allow rain for crops. This destroys all the possible eucalyptus found in Melbourne, leading to a pack Koala's destroying all the generators powering trams. There is no more public transport and government are forced to let children obtain their licence. It's chaos, car pile ups on every street with citizens too scared to take their cars out of their driveway. Everyone evacuates Melbourne as a result and you're left stranded with the Koala's, at least with some nice temperature.
(I'm procrastinating I'm sorry)
I wish public transport was free from students in primary-tertiary education.