Governor Maura Healey is tightening the rules in the state emergency shelter system. 

Healey yesterday announced major changes to the system as the state grapples with a lack of shelter space and funding for the program. 

The new rules will limit the length of stays in overflow shelters to five days, and create new priority lists for stays in permanent shelter sites. 

Previous rules allowed families to stay in overflow shelters for up to 30 days with the ability to reapply.