
Does the hurricane scale need a Category 6? New climate study found 5 recent storms have met the threshold.
CBSN
As global temperatures continue to increase, making storms more intense, some researchers say that the Saffir-Simpson scale, which measures a hurricane's wind speeds, doesn't adequately address the hazards associated with extreme storms. In a new study, scientists explored a hypothetical expansion of the scale to include a Category 6, and found that such a designation could help focus people of the worsening risks.
In a new study, published Monday in Proceedings of the National Academy of Sciences, researchers found that the scale, which was created in the early 1970s and is still used to define hurricane categories, has a "weakness": tops out at Category 5 even though "the destructive potential of the wind increases exponentially."
The hurricane categories run from 1 to 5, with Category 5 hurricanes having wind speeds of 156 mph or stronger — enough to produce "catastrophic" damage, which NOAA says can result in "complete roof failure on many residences and industrial buildings," as well as extended power outages.

Russia has released Ksenia Karelina, a dual U.S.-Russian national who was sentenced to 12 years in prison for treason in August last year, U.S. Secretary of State Marco Rubio said in a social media post early Thursday, offering no information about the terms of her release. The Wall Street Journal first reported Karelina's release, saying she was freed in a prisoner swap orchestrated by the two countries' intelligence agencies.

London — The British government's broadcasting regulator Ofcom announced Wednesday that it is investigating an online suicide forum reportedly linked to 50 deaths in the U.K. Ofcom said it was using new powers granted under British law to look into whether the site's service provider had "failed to put appropriate safety measures in place to protect its U.K. users from illegal content and activity."

Goma, Democratic Republic of Congo — Anthrax poisoning has killed about 50 hippos in Virunga, Africa's oldest national park, which is located in the Democratic Republic of Congo's troubled east, the head of the park told AFP on Tuesday. The toxin is caused by a spore-forming bacterium, Bacillus anthracis, which survives for decades in soil where animals that died of anthrax or were carriers were buried. It is transmissible to humans and potentially fatal in its inhaled form.

Moscow — An appellate court in Russia's far east on Monday reduced the prison sentence for an American soldier convicted of stealing and making threats of murder, Russia's state news agency RIA Novosti reported. Staff Sgt. Gordon Black, 34, flew to the Pacific port city of Vladivostok to see his girlfriend and was arrested in May 2024 after she accused him of stealing from her, according to U.S. officials and Russian authorities.