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In the wake of the deadly flash floods in Texas, state leaders are exploring whether to install more flood warning sirens. Such sirens can save lives if they're part of a larger warning system.

Europe is warming faster than any continent. That's speeding up glacial melt, which is already threatening Europe's largest rivers.

After talks between the U.S. and Iran collapsed, President Trump said the U.S. will "blockade" the Strait of Hormuz. The U.S. military said it would blockade ships entering or exiting Iranian ports.

U.S. Defense Secretary Pete Hegseth asked Army Chief of Staff Randy George to step down and retire, a U.S. official confirmed to NPR.

U.S. officials confirmed a case of the flesh-eating parasite in a person who traveled from El Salvador. Screwworm typically affects cattle in South America but has spread north in recent years.