Being in school full-time I work per diem with just one hospital and on a schedule that is mine, and everything works out well. However, every so often I get these calls from the agency begging me to come in because the hospital is extremely busy and they need everybody they can get.
The actual translation is that more staff than normal called in sick. Today it was because it has been raining for the past 12 hours, it is so predictable when this is going to happen. Halloween fell on the weekend this year so all the parties were Friday and Saturday nights, so why was it a surprise to have numerous calls both Saturday and Sunday morning.
Pretty soon more holidays and school will be out for the little kids, so will they prepare knowing sick calls will be going up, probably not. This is not a crisis, this is a staff problem. The weather is bad and people call in sick, staff wants to extend their vacation for a day or two and they call in sick, hangovers from holiday parties equal sick calls. The only ones hard to predict are the real sick calls.