What happens if a squirrel bites you? any rabies risks?

Unlikely: Per the cdc website, "small mammals such as squirrels... Are almost never found to be infected with rabies and have not been known to cause rabies among humans in the us. Bites by these animals are usually not considered a risk of rabies unless the animal was sick or behaving in any unusual manner and rabies is widespread in your area". See http://www.Cdc.Gov/rabies/pets/.