In hot weather the stench from the Thames was so bad that sittings became impossible to maintain sometimes. It was still widely believed that disease was carried by foul air a belief which certainly encouraged the House to suspend sittings. It prompted the government to hire Bazalgette to construct a vast system of sewers and to build the Embankment, the wide roadway running along the North side of the river containing main sewers and an underground railway line running eastwards.