The levee breach that left an entire California town underwater this weekend is putting a spotlight on how the state’s vital flood control infrastructure is being weakened by age, drought, climate change, rodents and neglect — leaving scores of communities at risk.

On Friday night, the swollen Pajaro River burst through the worn-down levee, flooding the entire town of Pajaro and sending its roughly 3,000 residents into what officials are now estimating to be a multi-month-long exile. A second breach was reported on Monday.