Firefighter Stephen Hunt got into difficulty inside the building at around 8.35pm, along with another firefighter, Greater Manchester Fire and Rescue Service said.
Both were pulled out by their colleagues and treated by the Ambulance Service before being taken to hospital.
More top news
Species affected include the African elephant, killer whale and Leatherback sea turtle.
Mist and fog to start with but making way for sunny spells as the day goes on.
An air steward notoriously blamed for starting the Aids epidemic in the US has been posthumously cleared of spreading the virus.