Quote Originally Posted by IanD View Post
A large scale drought across Europe may be a more realistic prospect leading to rapid rises in food costs and civil unrest as crops dry out in the fields. That and a never ending winter due to ash from a super volcano. Or a hurricane (a proper one, in defence of Michael Fish) hitting the UK. Maybe the Thames flood barrier will fail and central London flood during rush hour. Wouldn't want to be on the underground then. Plenty of more realistic scenarios compared to aliens landing or being hit by a meteorite. For anyone interested in such matters, Coventry Uni have a good degree course on disaster and emergency planning.
A major drought in Africa could result in mass migration to the Mediterranean coast and more boats arriving in Southern Europe than the authorities can deal with.