Extreme storms affect over 500,000 people without power, with 15,000 flights canceled and empty stores. Authorities warn about the dangers.

Authorities in the U.S. warn that winter storms can have a catastrophic impact, affecting over 500,000 people without power and causing the cancellation of over 15,000 flights. Stores have run out of supplies as people rushed to stock up. President Donald Trump declared a state of emergency in 12 states, describing the storms as "historic." Climatologist John Nielsen-Gammon emphasized that the phenomenon will last several days and will affect extensive regions. Authorities urge the population to avoid travel, and in case they remain stranded, to ensure they are in a safe place.

The governor of South Carolina warned that the power outage could last up to four days, affecting the operation of appliances and heating systems. The Department of Energy issued an emergency order to allow the use of backup generators in Texas, in the context where repair teams will be overwhelmed.