How to Prepare Your Properties for El Niño

A developing "Super" El Niño is forecast to reach historic strength by late 2026. Heavy rains can turn small maintenance issues into costly property damage. For property managers, now is the time to identify vulnerabilities and address them before the next major storm.

Why El Niño Preparation Matters for Southern California Properties

Southern California may be known for its relatively dry climate, but heavy rainfall can put considerable stress on commercial buildings and infrastructure.

Roofs, balconies, waterproofing systems, drainage areas, exterior walls, windows, asphalt, and other building components all need to work together to keep water away from vulnerable areas.

When routine maintenance is overlooked, a small issue—such as a clogged drain or deteriorated waterproofing membrane—can become a much larger problem during a major storm.

For property managers, preparing for El Niño is not just about responding to damage. It's about identifying potential problems before they become emergencies.

1. Inspect Commercial Roofs and Waterproofing

Your roof is one of the most important defenses against heavy rain.

Before the rainy season, have your commercial roof inspected for signs of deterioration, including:

• Damaged or missing roofing materials

• Cracked or deteriorated sealants

• Ponding water

• Failed flashing

• Deteriorated roof penetrations

• Damaged drains and scuppers

• Areas of previous leaks

• Aging or failed waterproofing systems

Waterproofing should also be evaluated around areas that are particularly vulnerable to moisture intrusion. Addressing roofing and waterproofing concerns before a major storm can help reduce the likelihood of leaks, interior water damage, and costly emergency repairs.

2. Clear Gutters, Drains, and Downspouts

A properly functioning drainage system is essential during heavy rainfall.

Blocked gutters, roof drains, and downspouts can cause water to accumulate where it shouldn't. Excess water can contribute to roof damage, flooding, erosion, and water intrusion into the building.

Before significant rain arrives, inspect and clear roof drains, gutters, downspouts, drainage channels, catch basins, storm drains, and any area where debris commonly accumulates.

3. Inspect Balconies and Exterior Surfaces

Balconies and elevated exterior surfaces can be particularly vulnerable to water intrusion when cracks or waterproofing failures are present.

You should look for cracks in concrete, deteriorated joints, failed sealants, standing water, damaged coatings, deteriorated balcony waterproofing, and areas where water isn't draining properly.

Small cracks or waterproofing failures may not appear urgent during dry weather, but heavy rainfall can expose weaknesses and allow moisture to reach areas that are difficult and expensive to repair. Preventive balcony and waterproofing inspections can help property managers identify these concerns before they become larger problems.

4. Check Doors, Windows, and Building Exteriors

Water can enter a commercial building through more than just the roof.

Inspect exterior doors, windows, walls, penetrations, and other vulnerable areas for potential points of water intrusion. Pay particular attention to damaged weather seals, failed caulking, cracked exterior surfaces, gaps around windows and doors, and damaged stucco or other exterior finishes.

If a property has experienced leaks during previous storms, those areas should receive additional attention before the next significant rainfall.

5. Address Asphalt, Concrete, and Drainage Problems

Heavy rain can also expose problems throughout parking lots, walkways, drive aisles, and other exterior areas.

Damaged asphalt and concrete can create areas where water collects instead of draining properly. Cracks, uneven surfaces, deteriorated drainage areas, and other site issues may become more problematic during periods of heavy rainfall.

Before the storm season, inspect your property's parking lots, driveways, sidewalks, concrete surfaces, drainage areas, and areas with recurring standing water.

Addressing these issues proactively can help reduce additional property damage and improve overall site safety.

6. Review Your Emergency Response Plan

Even with proper preventive maintenance, unexpected problems can happen.

Property managers should know exactly who to contact if a roof begins leaking, a building experiences water intrusion, or storm damage occurs. Your emergency response plan should include emergency contractor contact information, procedures for reporting water damage, and locations of important shutoffs.

Having an emergency contractor identified before a storm can save valuable time when every minute matters.

Is Your Property Ready for the Next Major Storm?

Don't wait until the first storm reveals a problem.

Schedule a property inspection or contact 55 Property Services to discuss your commercial property's roofing, waterproofing, drainage, maintenance, and storm-preparation needs.

Preparing your property now can help protect your building, minimize costly damage, and give your team greater peace of mind when the weather turns.