With climate change making temperatures more extreme each year, like we recently saw in the great Texas freeze and the Northwest heatwave, large-scale power outages become a matter of life and death. In 2003, a few transmission lines went down in Ohio leading to cascading failures across the Northeast and over 50 million people losing power. This event points toward critical vulnerabilities in our aging power grid. Could a power grid failure during an extreme weather event be the most deadly weather disaster in US history? And what can we do to prevent this kind of catastrophic blackout? Watch to find out.