Are the circut breakers melted of disfigured in any way? If they simply tripped they are probably still good. You can check them by removing them and using an ohm meter; place one lead on the spring clip that engages the buss bar and the other lead on the screw where the wire goes in (with the breakers in the "on" position). Also, look for wire insulation melted in the panel and burned receptacles or light fixtures in the bathroom. If all this checks out OK, re-insert the breakers and screw the wires back in them, turn them on. If they kick the breaker instantly there is probably a short in the wall somewhere; time to call the electrician.