We are having some sort of plumbing problem. When it rains for several days our toilets will not flush. We never have trouble with the showers or sinks, however while having this problem, when we take a shower the toilet does gurgle, but the shower drains fine. Could this be aproblem with the septic tank, drainfield vent pipe, or what. This is driving me crazy!

We live in a single floor house with two bathrooms, one behind the other in the floorplan. We do not have city sewer, a septic tank.

Thanks