Rainy Climate Linked to Autism
According to a recent study funded by Cornell University, the number of kids in a given area developing autism goes up when the climate is rainier. The study’s findings leave its researchers wondering if precipitation itself may trigger the disorder when children are genetically vulnerable to it.
Cornell’s Michael Waldman, PhD, led the research team to Washington, Oregon, and California, where the team compared autism rates on a county-by-county basis with county-based daily precipitation reports issued by the National Climate Data Center. The study spanned the years 1987 through 2001, the same years the children in the study were in school.
Waldman states he found a positive link between the prevalence of autism in all three states and the amount of rainfall normally occurring in the individual counties. Furthermore, in California and Oregon, the autism prevalence was highest when a child was exposed to a wet climate before the age of 3, the age symptoms often begin to appear and a long enough period of time for any environmental influences to become evident.
Although the link has been established, the reason behind the link is still unknown. Children spend more time indoors when it’s raining outside and they often spend indoor time watching television or playing video games, two activities known to affect a child’s cognitive and behavioral development. While indoors on rainy days, children may be exposed longer to toxic chemicals in household cleaning supplies or the indoor activities, away from the sunshine, may hinder vitamin D production in a way that triggers autism in vulnerable children. Or perhaps the precipitation itself is the culprit, possibly raining down chemicals from the upper atmosphere on children at risk of autism.
The study’s authors note that their research should be considered preliminary at this time and that further research is needed to determine if rain is an environmental trigger for autism and, if so, how exactly does it influence development of the disorder.
The Archives of Pediatric Adolescent Medicine has published the Waldman study in its most recent issue.
Source: JAMA











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there is no permanent cure for autism yet, most autism treatments are experimental”:’
there has been no permanent cure for autism yet but i think stem cells could also help:’”
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