West LA Pre-Rain Season Home Checklist: What to Do Before October

Los Angeles receives 12–15 inches of rain annually — but unlike most climates, that rain arrives in concentrated bursts over a compressed season. After months of sun and dryness, everything that was borderline in June is a failure point in January. This checklist covers the preparation that prevents the most common and costly West LA rain-season damage events.

Roof and Gutter Preparation

Clear all gutters of the summer's accumulated debris — leaves, twigs, seed pods, dust. Inspect downspout outlets to confirm they're routing water at least 6 feet from the foundation. Walk the roof visually or have it professionally inspected: look for missing or lifted shingles, cracked flashing at penetrations, and any flat roof sections where drainage may be compromised. Fix anything you find now — repair costs in October are a fraction of repair-plus-water-damage costs in January.

Drainage and Foundation Perimeter

Walk the perimeter of your home after any pre-season rain. Where does water pool? Where does it run toward the foundation rather than away? Confirm that ground slopes away from the structure at all points. Check any window wells for debris. Clear any surface drainage swales of vegetation that accumulated over summer. Hillside properties should inspect all French drain cleanouts and confirm flow through each outlet.

Plumbing and Interior Preparation

Check under every sink for slow drips that have been running unnoticed. Inspect the area around the water heater and washing machine connections. Check ceiling areas below any upstairs bathrooms for discoloration that might indicate a previous slow leak. If your home has a sump pump, test it before rain season — not during. Replace the battery backup on any sump system. These checks cost 30 minutes and can prevent the water damage events that most commonly hit West LA homes during winter.