A Look at How Extreme Summer Heat Affects Buried Pipes

Does Summer Heat Threaten Underground Pipes?
When the temperature climbs past 90°F, most of us worry about sunburn, air conditioning bills, and keeping our lawns green. But there’s a hidden risk you might not be thinking about – your buried pipes. Just because they’re underground doesn’t mean they’re protected from extreme weather. In fact, prolonged summer heatwaves can put serious stress on your buried water and sewer lines, leading to leaks, cracks, or even full-blown pipe failures.
How Does Extreme Summer Heat Affect Buried Pipes?
1. Soil Shifting and Ground Movement
One of the biggest dangers to buried pipes during a heatwave is drying soil. As soil loses moisture, it contracts and shifts. This movement can:
- Put pressure on pipes, causing them to crack or dislodge
- Create gaps where pipes were once supported
- Damage pipe joints and seals
This is especially problematic for homes with clay-heavy or expansive soil, which is prone to shrinking during hot, dry spells.
2. Increased Water Demand
Hot weather often leads to more water use — from lawn irrigation systems to swimming pool refills. This puts added stress on underground water supply lines, increasing the risk of leaks or ruptures, especially in aging infrastructure.
3. Thermal Expansion
Although buried pipes are generally more insulated from surface temperatures, extreme and prolonged heat can still cause thermal expansion, especially in shallow or poorly installed pipes. This stress can lead to buckling, joint failure, or pipe bursts.
4. Root Intrusion Accelerates
Believe it or not, tree roots grow more aggressively in the heat as they search for moisture, making your sewer lines and buried pipes prime targets, especially if there are small cracks or leaks already present. Once roots infiltrate, they can cause major blockages or even pipe collapse.
Warning Signs of Damaged Underground Pipes
You won’t always see underground pipe issues right away — but there are key warning signs to watch for:
- Unusually soggy or sunken spots in your yard
- A sudden spike in your water bill
- Foul odors near your lawn or garden (a sign of sewer leaks)
- Drop in water pressure
- Gurgling drains or frequent backups
If you spot any of these, don’t ignore them — what’s underground won’t stay hidden for long.
Some Ways on How to Protect Buried Pipes in Hot Weather
✅ Hydrate the Soil Around Your Foundation
Keeping the soil evenly moist (but not overwatered) helps prevent excessive shrinkage and ground shifting. A soaker hose around your foundation can help stabilize soil moisture levels.
✅ Maintain Your Irrigation System
Check for leaks or overwatering. Leaking irrigation lines not only release water but can contribute to soil erosion and added stress on your underground plumbing system.
✅ Consider Trenchless Pipe Repair or Replacement
If your underground pipes are already damaged, you should check out utility companies about trenchless repair options. These minimally invasive techniques avoid tearing up your yard and are ideal for dealing with heat-related damage.
Don’t Let Heat Sneak Up on Your Pipes
Extreme summer heat is tough on everything — including your buried plumbing system. While these issues often stay out of sight, they can quickly lead to costly damage if ignored. The good news? With the right maintenance, early detection, and smart prevention, your pipes can stay strong all season long. At DVUC, we have the experience and expertise to handle residential water line issues or pipe emergencies. Contact us today to learn more!








