Andylane, I feel for you and agree with what the previous posters have said; I just wondered whether it would do any good to go above your boss to someone in administration with a few of your co-workers and discuss the dangerous situation there and your plans to leave. Before I left my previous job, I talked to some "higher-ups" and although it didn't do any good, I felt better when I eventually left that I'd at least tried to change things as best I could.
In our 65 bed med-surg unit, the night shift is having a terrible time with staffing, too. Nurses keep baling out to other units or leave the hospital. The staff are all on the verge of burn-out, and the cycle of new people coming on and long-term nurses leaving just creates this viscous self-perpetuating cycle.
Management has offered month-long bonuses of $2,000 to nurses from other shifts to help out, and they occassionally have an Agency nurse on. When I've read the job postings, they all require that a new hire for nights be willing to do both peds and chemo, which, IMHO, is asking a lot in this time of nursing shortage (Don't know if they expect certification.) What's needed are nurses at this point, forget specialty!