NEW ORLEANS (AP) - Many New Orleans residents woke up to inconvenient news - much of the city was under a precautionary boil water advisory.
 
City officials say Saturday's advisory was issued out of an abundance of caution after a power loss at a distribution system caused a pressure drop to low levels. The concern is that low pressure can allow contaminants to enter a water pipe.
 
The advisory affects all New Orleans Sewerage and Water Board customers on the East Bank of the Mississippi River. Pressure dropped to below the safety threshold between 6:42 a.m. and 6:50 a.m.
 
It was unclear when the advisory would be lifted. Recurring power problems have plagued the Sewerage and Water Board in recent years - at times affecting the drinking water system and the city's drainage pumps.