The 3.1-magnitude quake struck shortly before 3 p.m. and was centered in the area of Rockhouse Canyon, around 11 miles due north of Borrego Springs and about a mile south of the Riverside County line.
Dry weather is expected to move into San Diego County Tuesday after a series of storms drenched the area and created dangerous conditions on streets and freeways.
A growing number of border communities are sounding the alarm on the border crisis, as migrants are being dumped onto their streets by Border Patrol, which has maxed out its ability to house recent arrivals.
Monsoonal flow into the Southwest was expected to bring another warm, humid day in San Diego County Tuesday with scattered showers and thunderstorms, the National Weather Service said.