A recent study has suggested that autism has a link to wetter climates, such as the United States’ Northwest.
There is some room for doubt, as autism diagnoses seem to be on the rise in all climates.
However, when plotted on a graph against daily precepitation reports, “Autism prevalence rates for school-aged children in California, Oregon and Washington in 2005 were positively related to the amount of precipitation these counties received from 1987 through 2001.”
The study was done based on autism rates from state and county agencies for children born in California, Oregon and Washington between 1987 and 1999.
While doctors agree that there is a genetic component to autism, many also believe that there could be an environmental effect that can trigger it as well.
The U.S. Centers for Disease Control and Prevention has launched a long-term study to find the causes of autism and other childhood conditions.
You can read some more commentary on this by Children’s Care.