It may sound bizarre but researchers at Cornell University say that after studying rainfall and autism rates for more than a decade they have found that autism rates were higher among kids who lived as babies or toddlers in a place where it rained a lot.
One theory is that heavy rain may force youngsters indoors, where they are more likely to watch t.v. and be exposed to cleaning products; both of which are linked to behavioral and cognitive development. Another theory is that there could be chemicals in the upper atmosphere that children are exposed to when it rains.
If you would like to read more, the study is in The Archives of Pediatric and Adolescent Medicine.