The Most Flood-Prone Areas in Maine
If it feels like flooding is worsening in Maine, you’re not imagining it. Stronger storms, rising sea levels, and outdated infrastructure put more homes at risk of water intrusion and damage. It causes concerns, like flooded basements, damp crawl spaces, and costly foundation problems.
Excess moisture can also lead to mold, pests, and air quality issues that threaten your family’s health. And in a severe flood, you may lose irreplaceable items like family photos, important documents, and keepsakes.
So, which areas in Maine are most flood-prone, and how do waterproofing solutions protect your home? Learn more below.
What’s Causing the Rise in Flooding Across Maine?
Maine and high tide flooding have long been connected, due to the state’s extensive river network, with 73 rivers longer than 20 miles, and its low-lying, expansive coastline.
Stronger storms and heavier rainfall events are causing rivers like the Penobscot, Kennebec, and Saint John to rise quickly and overflow, damaging nearby homes and infrastructure.
Winters are also bringing more snow, and when it melts rapidly in spring, the surge of runoff can overwhelm rivers and outdated drainage systems.
Ultimately, climate change is driving more extreme weather and unpredictable precipitation, increasing the overall flood risk across the state. Today, Maine ranks as the 15th most flood-prone state in the contiguous U.S. due to these growing climate pressures.
Which Areas in Maine Are Most Flood-Prone?
While all parts of Maine are affected by seasonal weather patterns, some cities face significantly higher flood risks due to their proximity to rivers, coastal areas, and outdated infrastructure.
Below are a few of the most vulnerable communities.
Portland, Maine
Portland is Maine’s largest metropolitan area and is susceptible to both coastal flooding and riverine flooding. The Presumpscot River, which runs through the city, is a major flood danger, while threats from nor’easters and coastal storms are becoming more frequent.
Bath, Maine
The Kennebec River runs past the historic and close-knit community of Bath, making it vulnerable to riverine flooding, especially during periods of heavy rain and snowmelt. Bath, Maine, has the highest risk of climate-related flooding.
Lewiston, Maine
Situated on the banks of the Androscoggin River, Lewiston, Maine is also prone to flooding. In December 2003, heavy rain combined with rapid snowmelt and warm temperatures eventually caused a record-breaking flood in Lewiston, Maine, which damaged roads and nearby areas.
These cities represent some of the most at-risk areas, but flooding can happen anywhere. Understanding your region’s risk level is the first step toward protecting your home and family.
How to Protect Your Home From Flood Risks
Portland, Bath, and Lewiston, Maine, aren’t the only areas at risk. Communities across the state are facing increased flood exposure as climate change, stronger storms, and outdated infrastructure put more properties in harm’s way.
Fortunately, many reliable waterproofing solutions exist to protect your home and reduce foundation damage:
- Sump Pump Systems: A sump pump system sends water out of your basement or crawl space, helping prevent flooding and water damage. Adding a battery backup ensures your home stays protected during power outages or mechanical failures.
- Interior Drainage Systems: These drainage systems prevent floodwater accumulation and damage by channeling water out and away from the basement.
- Vapor Barriers: Installed along crawl space walls and floors, vapor barriers block ground moisture from entering your home, reducing humidity and preventing mold growth.
- Dehumidifiers: High-capacity dehumidifiers regulate humidity levels, improving air quality and preventing moisture-related issues like mold and mildew.
- Crawl Space Encapsulation: Sealing the crawl space controls moisture. Vapor barriers, insulation, and other solutions manage water seepage, regulate temperature, and protect your home’s foundation.
- Foundation Crack Repair: Water seepage through foundation cracks causes detrimental damage if not addressed. Foundation crack sealants help prevent further water damage.
These waterproofing solutions create a comprehensive defense against flooding and moisture intrusion. Whether you’re dealing with minor dampness or preparing for severe weather, taking proactive steps now helps protect your foundation, preserve your belongings, and ensure a healthier living environment for your family.
Take the First Step Toward Flood Protection With Groundworks
Groundworks helps homeowners in Portland, Bath, Lewiston, and other Maine communities protect their properties from flooding. Our experts provide free inspections, identify the source of water intrusion, and recommend proven solutions tailored to your needs and budget.
With decades of experience, you can trust us to get the job done right the first time.
Basement Waterproofing FAQs
Hydrostatic pressure occurs when water-saturated soil presses against your foundation walls, leading to cracks, leaks, and structural damage over time.
Yes, it is normal and expected for a basement floor drain to have some water in it. Basement floor drains are designed to collect and divert excess water that accumulates in the basement, such as water from flooding, leaks, or high groundwater levels. As long as the water is slowly draining away and not pooling, the presence of water in the floor drain is a sign that the drainage system is functioning as intended.
While a dehumidifier can help reduce moisture after flooding, it’s not a solution for flooding issues. A proper waterproofing system is necessary for severe water problems.
