The Sierra Madre emergency alert system is flying a green flag today — which means the city is in Stage One alert mode for potential mudslides.

The system alerts residents to mudslide danger on local hillsides. It grew out of a wildfire last spring that destroyed several acres fo brush in the foothills just above the tiny San Gabriel Valley community.

Here’s what a Green Flag means, according to the site:

The City’s state of emergency level is now at Stage One: GREEN FLAG–Activated under a prediction of 80%–100% chance of precipitation. Affected residents should get “READY” for potential evacuation. This includes keeping a close watch on weather forecasts.

Here’s some city links of interest: