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.

The Pasadena Public Health Department reported Friday there was an outbreak of the gastrointestinal Norovirus at the American Red Cross’ Pasadena Evacuation Shelter for area residents displaced by the Los Angeles wildfires.