Rick Stevens / AP

By the year 2100, 74% of people on Earth may be exposed to deadly heat waves if nothing is done to address climate change, according to a new study published in Nature. Researchers found that 30% of the world's population is currently at risk from deadly heat and even if we begin to drastically reduce greenhouse gas emissions, 50% will still be at risk.

The study: Lead author Camilo Mora and a team of researchers examined nearly 2,000 case studies between 1980 and 2014 where people died from extreme heat. They then collected climate data from the times and locations of each incident, including temperature, humidity, solar radiation, and wind speed.

The heat threshold: The scientists concluded that when combined with high humidity, moderate temperatures around 90 degrees Fahrenheit became deadly, while continual exposure to conditions above body temperature, 96.8 degrees Fahrenheit, is dangerous. When our bodies get above 104 degrees Fahrenheit, cellular machinery begins to break down, and anything above that requires immediate medical attention.

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Updated 52 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Global: Total confirmed cases as of 9 p.m. ET: 20,755,406 — Total deaths: 752,225— Total recoveries: 12,917,934Map.
  2. U.S.: Total confirmed cases as of 9 p.m. ET: 5,246,760 — Total deaths: 167,052 — Total recoveries: 1,774,648 — Total tests: 64,831,306Map.
  3. Politics: House Democrats to investigate scientist leading "Operation Warp Speed" vaccine projectMcConnell announces Senate will not hold votes until Sept. 8 unless stimulus deal is reached.
  4. 2020: Biden calls for 3-month national mask mandateBiden and Harris to receive coronavirus briefings 4 times a week.
  5. States: Georgia Gov. Brian Kemp to drop lawsuit over Atlanta's mask mandate.
  6. Business: Why the CARES Act makes 2020 the best year for companies to lose money.
  7. Public health: Fauci's guidance on pre-vaccine coronavirus treatments Cases are falling, but don't get too comfortable.

Trump says he intends to give RNC speech on White House lawn

President Trump speaking to reporters on South Lawn in July. Photo: Jabin Botsford/The Washington Post via Getty Images

President Trump told the New York Post on Thursday that he plans to deliver his Republican National Convention speech from the White House lawn, despite bipartisan criticism of the optics and legality of the location.

Why it matters: Previous presidents avoided blurring staged campaign-style events — like party conventions — with official business of governing on the White House premises, per Politico.

Fauci's guidance on pre-vaccine coronavirus treatments

Illustration: Aïda Amer/Axios

Antibody drugs and various medicine cocktails against the coronavirus are progressing and may provide some relief before vaccines.

The big picture: Everyone wants to know how and when they can return to "normal" life, as vaccines are not expected to be ready for most Americans for at least a year. Two therapies are known to be helpful, and more could be announced by late September, NIAID Director Anthony Fauci tells Axios.