Why have we had so much rain?

Why have we had so much rain: 7% more moisture

Understanding why have we had so much rain helps communities prepare for increasingly destructive weather patterns. Extreme precipitation poses serious risks to infrastructure and property safety globally. Recognizing the underlying environmental shifts allows residents to adapt effectively to these frequent, intense deluges and protect their homes from severe flooding.

Why have we had so much rain lately?

Increased rainfall is primarily driven by climate change and heavy rain patterns, as warmer air holds more moisture - roughly 7% more per 1 degree C of warming - leading to heavier, more intense downpours ^[1].

This effect is amplified by warmer oceans increasing evaporation, erratic jet stream patterns stalling storms, and natural cycles like El Nino bringing increased precipitation. It feels like the sky has simply forgotten how to turn off. But there is a hidden driver behind these persistent gray skies that most people overlook - a phenomenon involving the jet stream that I will reveal in the section on weather patterns below.

It is not just your imagination; is it raining more than usual is no longer a question, as the rain is actually becoming more frequent and significantly more intense. Across the globe, hourly rainfall rates have become heavier in nearly 90% of large U.S. cities since 1970, ^[2] shifting the very nature of our storms from steady drizzles into sudden, overwhelming deluges. I remember staring at my backyard last spring, watching it transform into a pond in less than 20 minutes. I had lived there for a decade and never seen anything like it. The math is simple, but the reality is messy.

The Sponge Effect: Why Warm Air Means Heavy Water

Because the global average temperature has already risen by about 1.4 degrees C since the pre-industrial era (as of recent years 2023-2025), our atmosphere is now much wetter than it was 100 years ago. ^[3]

In my experience as a weather observer, people often find this counterintuitive. They ask: If it is global warming, shouldnt things be drying out? Well, not exactly. While some areas do face worse droughts, the overall cycle accelerates. More heat leads to more evaporation from our oceans. That moisture has to go somewhere. Usually, it ends up as a massive downpour in a neighboring region. It is a feast-or-famine cycle that our infrastructure was never built to handle. We were wrong to assume the climate would stay stable.

The Buckling Jet Stream: Why Storms Get Stuck

Here is the hidden driver I mentioned earlier: the stalling effect caused by a weakening jet stream. The jet stream is a high-altitude river of air that steers weather systems across the globe. Normally, it moves quickly, pushing storms along like a conveyor belt. However, as the Arctic warms faster than the rest of the planet, the temperature difference that powers the jet stream decreases. This causes the stream to become wavy and sluggish, providing a clear explanation for why have we had so much rain in certain regions. Rarely have we seen such dramatic shifts in these high-altitude winds.

When the jet stream slows down, weather patterns get stuck. If a rain-heavy low-pressure system moves over your house while the jet stream is in a sluggish state, that storm might sit there for days instead of hours.

This is why we are seeing more persistent rain events where it pours for a week straight. It is not necessarily that there are more storms, but that the storms we have are refusing to leave. Lets be honest, the science of the jet stream is a mess even for experts, but the results - flooded basements and saturated fields - are all too clear.

Ocean Heat: The Engine Room of the Sky

Our oceans have absorbed over 90% of the excess heat trapped by greenhouse gases, leading to record-high sea surface temperatures in 2024 and 2025. ^[4] This warm water acts as high-octane fuel for storms. As water temperatures rise, the rate of evaporation increases significantly. This feeds an endless supply of moisture into the atmosphere, creating atmospheric rivers - long, narrow regions in the atmosphere that transport most of the water vapor outside of the tropics. Think of it as a fire hose in the sky aimed directly at the coast.

I used to think of the ocean as just a big heat sink that would buy us time. But after seeing why are storms becoming more intense with the rapid intensification of storms over the Atlantic in the last few years, Ive realized that the ocean is more like a pressurized boiler. When that pressure escapes, it comes down as rain. Data shows that even a small increase in ocean surface temperature, specifically in the North Atlantic where we have seen anomalies of 2 to 3 degrees C recently, can lead to a 20-30% increase in the rainfall potential of a single hurricane or tropical storm.

Modern Rain vs. Historic Patterns

Historic Rainfall (Pre-1970)

- Lower overall water vapor content due to cooler average temperatures.

- A more stable jet stream typically moved weather systems quickly across land.

- Rainfall was more evenly distributed over several days, allowing soil to absorb it.

Current Rainfall (2020 - 2026)

- Higher vapor levels (roughly 7% more per 1 degree C) lead to heavier drops.

- Slow or stalling weather patterns cause storms to linger over one area for days.

- Intense hourly rates increase flash flood risks as soil becomes saturated instantly.

The Struggle of a Family Farm in Iowa

Mark, a fourth-generation farmer in Iowa, faced a nightmare in 2025. After years of predictable spring planting, he was hit by three 'once-in-a-century' rain events in a single month. His fields were so saturated he couldn't get his tractor out without it sinking into the mud up to the axles.

He first tried to dig deeper drainage ditches, thinking it was just a local runoff issue. It didn't work. The sheer volume of water was so great that the local creek backed up into his fields, turning 40 acres of prime corn soil into a swamp. He felt a deep sense of panic watching his livelihood literally wash away.

The breakthrough came when he stopped fighting the water and started working with the soil. He realized that decades of heavy tilling had killed the soil's natural ability to act as a sponge. He switched to cover crops and no-till farming to rebuild the organic matter.

By 2026, his soil could absorb 2 inches of rain per hour without pooling. While his neighbors were still stuck in the mud, Mark's fields were draining 40% faster. He learned that while he couldn't control the sky, he could finally control how his land reacted to it.