<p>Seven cities on three continents are now regularly flooding despite official assurances they were safe from rising waters.</p>

<p>Climate change has doubled the odds of a mega-flood, and outdated risk models leave millions exposed in vulnerable regions worldwide.</p>

<p>Nine popular eco-friendly habits sound virtuous but scientists say they make very little real environmental difference.</p>

<p>American weather patterns deliver tornadoes, hurricanes, heat domes, and wildfires simultaneously, unlike anywhere on Earth.</p>

<p>Mount Rainier is America’s most dangerous volcano. Scientists warn lahars could devastate 150,000 people with little warning. </p>