Administrators are trying new recruiting tactics and offering bonuses to make up for the shortfall. But for now, open shifts in some states have to be covered with mandatory overtime.
Oklahoma oil is expensive to produce, so the sharp drop in prices has forced many drilling companies to cut jobs. If prices stay low, the pain could spread to the banks that finance the oil industry.
Big-energy states are hoping the cheap oil is just a blip. In Oklahoma, the head of a catering firm delivering food to oil field workers worries that "$40-a-barrel oil? It's going to shut everything."
There were hugs and tears, smiles and laughter on Thursday, as students and teachers from Plaza Towers Elementary School, destroyed in Monday's tornado in Moore, Okla., reunited. The school district reopened all of its schools just for the day on what would have been the final day of classes before summer vacation.
When disaster strikes, our natural instinct is to take cover and seek shelter. But in severe weather, especially the type that breeds tornadoes like we saw in Oklahoma and parts of the Midwest this week, there are those who ride toward the storm.