GLENDORA (CBSLA.com) — Glendora city officials Tuesday raised the alert level to yellow for residents living in the Colby burn-area out of fear of mudslides.

The first of two back-to-back storms moved into the area overnight, with at least an inch of rain expected to fall by Wednesday.

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Officials worry that over-saturated land from last week’s storm may trigger slides.

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A yellow alert level advises residents to move cars, trash cans and other debris from city streets.

No evacuation orders were in effect.

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City crews were set to make extra patrols for areas of concern.