A map from NWS Portland shows when coastal Oregon is expecting the heaviest rainfall from an ongoing storm that could dump a month's worth of rain in some areas this weekend.

Why It Matters

The forecast comes as meteorologists have warned that climate change has contributed to the prevalence of 100-year and 1,000-year floods across the U.S. in recent years. As the atmosphere warms, it gains the ability to hold more moisture, which in turn can fuel heavy rains when storms roll into the area.

Such rains have brought devastating flash floods to many parts of the U.S. this summer, including Texas, Wisconsin, and Tennessee.

What to Know

People in Washington and Oregon were warned of the rare August storm earlier in the week. The moisture-laden storm is arriving during the dry season fo

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