Preventative action means taking steps to stop something bad from happening in the future. It involves acting beforehand to prevent problems or accidents from occurring. Full definition
The following are recommendations for taking preventative action against the summer slide, as well as ways to counteract the effects of the summer slide. (fastbridge.org)
This type of preventative action is hard to sell to customers, but it is for their own good. (petbusiness.com)
He believed in it but he also hoped its predictions could be avoided if preventative actions were taken. (religion.blogs.cnn.com)