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The growth in housing density over the past 40 years in the region that's in Hurricane Laura's path. Credit: Stephen M. Strader

The population density of the Texas-Louisiana coastal region where Hurricane Laura is set to make landfall as a Category 4 storm has increased significantly over the past 40 years.

Why it matters: The damage a storm can do is a function not just of its sheer strength, but the number of people in its path. As more people live in coastal regions, we will get an increasingly "expanded bull's-eye" of hurricane risks.

What's happening: As Hurricane Laura is set to hit the Gulf Coast tonight or tomorrow morning, it has sustained winds of about 140 mph and could cause "unsurvivable storm surges" as high as 30 feet.

  • But while the storm's sheer power — and the role that climate change might play in intensifying that power — grabs attention, the more immediate multiplier is the increase in the number of people living in harm's way.

By the numbers: The population of coastline counties in the Gulf of Mexico region increased by more than 3 million, or 24.5%, between 2000 and 2016.

  • That's the fastest growth among all coastline counties, and significantly faster than total U.S. population growth over the time period.
  • The GIF above, posted on Twitter by the Villanova University geographer Stephen M. Strader, shows the growth in housing density over the past four decades for the region that's in Laura's path.

How it works: The spread of development in natural disaster-prone areas creates what experts call an "expanding bull's-eye" effect of increased risk.

  • Imagine the Gulf Coast as a dartboard. As development expands, the bull's-eye — the area where a storm might do maximum damage — expands as well.
  • That means more people and more property in the path of a possible hurricane, increasing the damage for a mild storm — and multiplying it for a severe one.

The bottom line: While more and more people move into fire, tornado and flood-prone regions, natural disasters will get worse — even before we begin factoring in climate change.

Go deeper

Updated Nov 10, 2020 - Science

Theta becomes 29th named storm in record hurricane season

A satellite image of Subtropical Storm Theta. Photo: National Hurricane Center/Twitter

Subtropical Storm Theta formed in the Northeast Atlantic Monday night, becoming the 29th named storm of the 2020 hurricane season, the National Hurricane Center confirmed.

Why it matters: The formation of Theta, which was some 995 miles southwest of the Azores overnight, breaks the record for the most named storms in a season — set in 2005. The World Meteorological Organization sets 21 alphabetical names for every season (excluding Q,U, X, Y and Z). This is the second time ever it's used all and had to turn to the Greek alphabet.

Editor's note: This article has been updated with further context on the hurricane season.

2 hours ago - World

Map: A look at world population density in 3D

This fascinating map is made by Alasdair Rae of Sheffield, England, a former professor of urban studies who is the founder of Automatic Knowledge. It shows world population density in 3D.

Details: "No land is shown on the map, only the locations where people actually live. ... The higher the spike, the more people live in an area. Where there are no spikes, there are no people (e.g. you can clearly identify ... the Sahara Desert)."

Biden's Day 1 challenges: The immigration reset

Illustration: Aïda Amer/Axios

President-elect Biden has an aggressive Day 1 immigration agenda that relies heavily on executive actions to undo President Trump's crackdown.

Why it matters: It's not that easy. Trump issued more than 400 executive actions on immigration. Advocates are fired up. The Supreme Court could threaten the Deferred Action for Childhood Arrivals (DACA) program, and experts warn there could be another surge at the border.

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