A series of fires that erupted across San Diego last week, destroying a home and displacing residents, started in homeless encampments, according to San Diego Fire-Rescue investigators Friday.

At the same time, more people are sheltering under bushes and trees. Homelessness along the riverbed rose after the city of San Diego passed a camping ban that boosted penalties for sleeping outside, and last fall the San Diego River Park Foundation tallied more than 420 individuals staying near local waterways, the group’s highest count yet.

The San Diego Fire-Rescue Department said the Center Fire was reported just before 9 a.m. on Jan. 22 in an area near Bernardo Center Drive and Camino del Norte.