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Power lines downed by Hurricane Ida are seen in Houma, Louisiana, on Aug. 30. Photo: Nick Wagner/Xinhua via Getty Images

The National Weather Service has issued a heat advisory for New Orleans, Baton Rouge and Houma, Louisiana, to Gulfport, Mississippi, as residents swelter in the wake of Hurricane Ida. The storm knocked out electricity to power air conditioning.

Why it matters: Heat tends to be the top weather-related killer annually in the U.S., and prolonged exposure to hot temperatures without any relief — either from air conditioning or cooler temperatures at night — significantly raises the risks of heat-related illness.

Details: The heat advisory covers both Tuesday and Wednesday across a broad region.

  • The Weather Service lowered its criteria for such an advisory to take into account the fact that more than 1 million households are still without power in Louisiana alone.
  • Heat index values of up to 105 degrees are forecast for Tuesday, while slightly hotter conditions of up to 106 are expected on Wednesday, the Weather Service said.

What they're saying: "Drink plenty of fluids, stay out of the sun, and check up on relatives and neighbors," the NWS said.

  • "Be very cognizant of your hydration levels and take plenty of breaks. The absence of some basic services amid high heat indices can make the situation very acute for areas challenged by power outages."

Threat level: It will take several weeks to months to restore power to the entire region, leaving the area vulnerable to more hot weather days.

Go deeper

Updated Sep 14, 2021 - Science

Hurricane Nicholas makes landfall in Texas

Weather conditions are seen in Galveston, Texas, ahead of Hurricane Nicholas. Photo: Brandon Bell/Getty Images

Hurricane Nicholas made landfall near Sargent Beach, Texas, Tuesday morning — threatening to bring up to 18 inches of rainfall and flooding to parts of the state and Louisiana, per the National Hurricane Center.

What's happening: Heavy rains, high winds and "dangerous" storm surges were ongoing, said the NHC, confirming just before 2am that the Category 1 hurricane had hit the state. Nearly 200,000 customers had lost power in Texas by 3:30am, per the utility tracking site poweroutage.us.

12 hours ago - Health

FDA advisory panel recommends Pfizer boosters for those 65 and older

A healthcare worker prepares a dose of the Pfizer-BioNTech Covid-19 vaccine at the Key Biscayne Community Center on Aug. 24, 2021. Photo: Eva Marie Uzcategui/Bloomberg via Getty Images

A key Food and Drug Administration advisory panel on Friday overwhelmingly voted against recommending Pfizer vaccine booster shots for younger Americans, but unanimously recommended approving the third shots for individuals 65 and older, as well as those at high-risk of severe COVID-19.

Why it matters: While the votes are non-binding, and the FDA must still make a final decision, Friday's move pours cold water on the Biden administration's plan to begin administering boosters to most individuals who received the Pfizer vaccine later this month.

12 hours ago - World

France recalls ambassadors from U.S. and Australia over submarine deal

Secretary of State Antony Blinken (L), French Foreign Minister Jean-Yves Le Drian (C), and French ambassador to the U.S. Philippe Etienne. Photo: Nicholas Kamm/AFP via Getty Images

France has taken the extraordinary step of recalling its ambassadors to the U.S. and Australia after both countries blindsided their French allies with a new military pact and submarine contract, the French Foreign Ministry announced on Friday.

The backstory: While sealing an agreement with the U.S. and U.K. to acquire nuclear submarines, Australia ripped up an existing $90 billion submarine deal with France. That led senior French officials to accuse the U.S. of a "stab in the back."