The Health Department confirmed three people at the shelter tested positive for the virus among a cluster of 28 people suffering from acute gastrointestinal illness.

First came the fires. Then, there was ash and contaminated water. Now, some survivors of the Southern California wildfires are dealing with outbreaks of norovirus and other stomach ailments at a shelter set up to help evacuees.

Three people have tested positive for norovirus amid a cluster of 28, the Pasadena Public Health Department said on Friday.

Illness typically lasts for one to three days but people can still be contagious after their symptoms have subsided.