Louisiana residents were ordered on Sunday to evacuate low-lying coastal areas as back-to-back hurricanes were forecast to bring strong winds and rain.
Tropical Storm Marco, which is forecast to hit the Louisiana coast with hurricane-force winds on Monday, will be followed by Storm Laura on Thursday.
Twin hurricanes arriving at the US coast within days "could result in a prolonged period of hazardous weather," National Hurricane Centre forecaster Stacy Stewart warned on Sunday.
Officials in Louisiana's coastal Lafourche Parish ordered a mandatory evacuation for residents of low-lying areas at noon on Sunday. The US Coast Guard also raised its warning for the Port of New Orleans, calling for ships to make plans to evacuate some areas.
The potential for flooding and evacuations added to worries about the spread of COVID-19.
In Grand Isle, at the state's southern tip, authorities were placing sandbags to bolster its protective levy while energy companies continued to pull workers from offshore platforms and shut production in the US Gulf of Mexico wells.
Israeli troops and tanks pushed on Saturday into parts of a congested northern Gaza Strip district that they had previously skirted in the more than seven-month-old war, killing and wounding dozens of Palestinians, medics and residents said.
Slovak Prime Minister Robert Fico is no longer in immediate danger but still in a serious condition, his deputy said on Sunday, four days after an assassination attempt that sent shockwaves through Europe.
At least 47 people have died after continued heavy rain and flooding in northern Afghanistan, an official said on Sunday, a day after a similar number were killed in a central province.
Russian airstrikes killed at least ten people and injured many others in a recreation area just outside Ukraine's northeastern city of Kharkiv on Sunday, local officials said.