We have two toilets in our home and they have quit flushing today. We also have a septic system that we have never had drained and we have lived here 6 years. We did get some rain today and we were wondering if it is due to the rain that we are having toilet issues or is something else going on?

What do you mean "quit flushing"?Does the water slowly go down, back up into a tub? If so that's an indication of a clog somewhere. Do the other fixtures, sink tub etc drain out quickly? Rain for 1 day isn't usually enough to saturate a drain field. However, look at the drain field area and see if it is soggy or smells like sewage. If so, you need to get the tank pumped out and hope the field is OK. If it turns out you need to replace the field, consider using an Infiltrator system.