Flood risk data for underwriters
Accurately understand and underwrite flood risk using our maps, models and Risk Scores
Turn risk into profit
With widespread flooding events increasing globally in recent years, private sector involvement in flood insurance has rapidly expanded. However, overall flood insurance uptake remains critically low, especially in high-risk zones, which represents an opportunity for underwriters.
By using Fathom’s data-driven insights, innovative tools and underwriting resources, you can refine risk selection, optimize capital allocation and leverage next-generation technology to underwrite, price and manage flood risk more effectively.
A changing climate means that extreme weather events are becoming more common. Average annual losses associated with flooding already total US $388 billion globally and are set to increase. This means the need for reliable, data-driven flood-risk insights and intelligent portfolio management is also increasing. Fathom’s data provides a consistent and reliable view of current and future risk.
Underwriters need to balance managing liability and finding opportunities for competitive advantage. To do so, you need innovative risk assessment tools that incorporate forward-looking data to help you adapt to evolving risks.
Underwriters are under pressure from brokers to analyze large amounts of data without compromising on accuracy. The only way to do this is to embrace new technologies, such as state-of-the-art remote sensing and machine learning, that can deliver accurate insights without the need to trawl through large amounts of data.
There is an inherent uncertainty gap when modeling complex future physical risks. When vendors are not transparent about how the risk is modeled and where the uncertainty lies, it is difficult for underwriters to price accurately and confidently. The way forward is to move away from black-box models towards transparent and multi-model frameworks.
Fathom’s playbook for underwriting flood risk in a changing climate
As the market softens through 2026 and beyond, underwriters are facing a difficult balance: increasing competition, rising loss costs, and more volatile, climate-driven flood risk. So the question is: How do you stay both competitive and profitable when calculating flood risk?
We built a practical playbook to help you answer that. Download the playbook to learn how.
Fathom’s data can help underwriters with
Efficient, accurate pricing
With increased pressure to price quickly and accurately, you need to feel confident in making fast decisions. Using Fathom’s data, you have access to technical precision to help you evaluate both present and future risk.
Reflecting the changing nature of risk
Flood risk is no longer static and historic averages are increasingly misaligned with today’s reality. Fathom delivers a globally consistent view of how climate-driven flood risk is changing, helping underwriters make better informed decisions while also providing insight into how risk may develop over time. This means fewer surprises, more resilient pricing and greater confidence in both short-term and longer-term portfolio strategy.
Defending decision-making
Pricing and risk selection are under constant scrutiny from brokers, reinsurers and regulators. Fathom’s glass-box approach provides full transparency: peer-reviewed, documented and validated methodologies show exactly how flood risk is modeled. The result? Clear, defensible decisions you can trust.
Identify risks and opportunities
Underwriters face growing pressure as extreme weather becomes more unpredictable and urban development increases. Fathom’s data provides clear, actionable insight into your portfolio, quantifying current and future flood exposure. This allows you to identify high-risk areas, allocate capital effectively, price with confidence, and improve loss ratios, turning risk awareness into a competitive advantage.
Streamlining quoting and decision making
With limited time and increasing volumes of data, underwriters need clarity and accessibility. Fathom’s Risk Scores condense complex flood data into simple, consistent metrics, allowing quick decisions on whether to write risks, investigate further or decline.
A practical way to work with uncertainty
Uncertainty is unavoidable in flood risk, but it doesn’t have to be paralyzing. By highlighting where risk is well understood and where caution is needed, Fathom enables underwriters to make balanced, robust decisions.
