Although the cause of each blaze has yet to be determined, they all burned in or near foothill communities amid gusty winds and dry air and vegetation.

The latest Santa Ana winds will return Monday, with the strongest gusts expected Monday night into Tuesday morning, as Los Angeles fires continue to burn.

Wildfires fueled by strong Santa Ana winds have devastated Southern California, destroying thousands of homes and causing 27 deaths. The fires, affecting urban areas and the Olympic preparation, are worsened by climate change and urban expansion.

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.