Climate change and home preparation: what every European homeowner needs to know

The climate your grandparents built their house for is gone. The climate against which your parents insured their property changes faster than the insurance tables follow.

What really changes

The average temperature in Europe has increased by 2.3 C since the pre-industrial era, about twice the global average. Belgium: +2.9 C on summer averages since 1950.

Rainfall intensity increases

Rain bombs (100+ mm in 6 hours) have become 3 times more frequent in Belgium since 1970. The evacuation networks designed in the 1970s for peaks of 50 mm/h see episodes at 90 mm/h.

This is why the Walloon floods of 2021 are not a “fluke” but a structural trend.

Dry periods are getting longer

Longer droughts in summer dry out soils and vegetation, increasing the risk of fire. Belgium had to issue forest fire alerts in 2019, 2020, 2022 and 2023.

The storms are moving

Roof losses in Belgium have increased by 40 percent since 2010 without an increase in the number of storms.

Heat waves are more frequent

Power outages during heatwaves have gone from “rare” to “an annual event” in Belgium since 2018.

What this means for a house before 2000

• Undersized evacuation capacity
• Minimal or absent basement waterproofing
• Cavity wall insulation that traps humidity
• Roof overhang too short
• No sudden infiltration forecast
• Electrical installations at potential flood level
• Garden drainage based on absorption today saturated

The reality of insurance

• Increase in premiums of 10 to 30 percent over the last 5 years in risk areas
• New exclusions in the event of repeated losses
• Certain property that has become uninsurable
• Longer payment terms
• Compensation for obsolete items more common

Practical adaptation plan over 5 years

Year 1: Audit and quick wins (500 to 1000 EUR)

• Official flood risk map
• Fire safety audit
• Interconnected smoke and CO detectors
• 5 to 10 leak detectors
• Reserve of hydro-active bags
• Small barrier for the front door
• Careful rereading of the insurance policy

Year 2: Main vulnerabilities (1500 to 3000 EUR)

• Anti-flood barriers on all exterior doors
• Sewer non-return valve installed by a professional
• Submersible pump in the basement
• Inverter for essential equipment
• Fire blankets and Class F fire extinguisher
• Emergency ladder for each bedroom upstairs

Year 3: Structural improvements (3000 to 8000 EUR)

• Review of basement waterproofing
• Rainwater recovery tank
• Permeable paving driveway and terrace
• Improvement of garden drainage
• Tree health audit

Year 4: Future-proofing (variable)

• Solar panels with battery
• Heat pump replacing fossil heating
• Better insulation with breathable materials
• Green roof or shade

Year 5: Review and upgrade

• Re-audit everything with a fresh eye
• Upgrading barriers or equipment at end of life
• Verification of technological advances

Emotional reality

Many react by doing nothing (“it won’t happen to us”). The data says otherwise.

More helpful response: Choose one thing. The measure has greater impact and less effort in your situation. Do it this month. Then take the next one.

The protection is cumulative. A house with 50 percent of the measurements is 80 percent better protected than a house with zero. No need for perfection. Need for progress.

Start with what you have

Before you buy, do the 30-minute audit:

1. Look around your house during the next big rain
2. Check your smoke detectors: when were they installed and when do they expire?
3. Read your insurance policy. Really read it
4. List the three things that worry you the most

Prevention is a marathon, not a sprint. But starting now beats starting after the disaster.