Systemic Lupus Erythematous (SLE) is a multisystem autoimmune disease. It has been identified as the underlying cause for death in an average 1,034 deaths from 2000 and 2014. Our cases highlight two rare but life-threatening complications of SLE; catastrophic antiphospholipid syndrome (CAPS) and diffuse alveolar hemorrhage (DAH) with mortality as high as 50-90%. Both cases presented with respiratory symptoms, required meticulous monitoring in ICU and were initially treated with broad spectrum antibiotics. However, unlike pneumonia, these patients required immunosuppressive and plasmapheresis leading to clinical improvement.