An environmentally hardened architecture comprises a hybrid processor, a high speed bus having environmentally-sensitive interfaces, an environmentally hardened bus having environmentally-hardened interfaces, and an environmentally-hardened processor communicatively coupled to an environmentally-sensitive interface of the high speed bus and communicatively coupled to an environmentally-hardened interface of the environmentally hardened bus. The hybrid processor includes an environmentally-hardened processing section and an environmentally-sensitive processing section. At least one environmentally-sensitive interface is configured to pass data to and from the environmentally-sensitive processing section and another environmentally-sensitive interface is configured to pass data to and from the environmentally-hardened processing section of the hybrid processor. An environmentally-hardened interface is configured to pass data to and from the environmentally-hardened processing section of the hybrid processor. The environmentally-hardened processor processes critical applications in the environmentally-hardened processing section of the at least one hybrid processor during an environmental event.