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Expand chart
Adapted from Robert A. Rohde / Berkeley Earth; Map: Harry Stevens/Axios

The summer of 2018 has been noteworthy for the all-time heat records smashed around the world, from California to Sweden and Japan.

Why it matters: The heat is a sign of a warming world, scientists have said, with human-caused global warming raising the odds of heat waves as well as increasing their severity and duration.

This visualization (above) shows the high temperature records set from May 1 through July 31, as compiled by Berkeley Earth, a nonprofit group that monitors global temperatures. Axios plotted daily record highs, monthly record highs and all-time record highs.

  • We did not include record lows because only daily record lows were made available. However, according to the National Centers for Environmental Information, warm temperature records have been significantly outpacing cold ones, including monthly and all-time cold records, worldwide so far this year. This was especially the case this summer.
By the numbers

Some of the records represented by the dots on the map include:

  • Norway set a new national maximum temperature record when temperatures soared to 33.5°C, or 92.3°F, on July 17 in Bardufoss. Norway also set a new warm national minimum temperature when it dropped to only 25.2°C, or 77.4°F, on July 18.
  • Warmer-than-average temperatures engulfed much of Sweden during July 2018, with several locations setting new monthly temperature records.
  • Montreal, Canada also set its all-time high temperature record, during a deadly Quebec heat wave in early July.
  • California set its record for the warmest July on record, while Death Valley set a record for the hottest month ever recorded on Earth.
  • Japan set a national temperature record of 106°F, or 41.1°C, in a heat wave that followed deadly floods.
  • In the Middle East: Quriyat, Oman, likely set the world’s hottest low temperature ever recorded on June 28, when the it failed to drop below 109°F, or 42.8°C.

Go deeper:

Go deeper

CDC: Vaccinated people in COVID hotspots should resume wearing masks

CDC director Rochelle Walensky and top infectious disease expert Anthony Fauci at a Senate HELP committee hearing. Photo: J. Scott Applewhite-Pool/Getty Images

The Centers for Disease Control and Prevention issued updated guidance on Tuesday recommending that vaccinated people wear masks in indoor, public settings if they are in parts of the U.S. with substantial to high transmission, among other circumstances.

Why it matters: The guidance, a reversal from recommendations made two months ago, comes as the Delta variant continues to drive up case rates across the country. Millions of people in the U.S. — either by choice or who are ineligible — remain unvaccinated and at risk of serious infection.

Scoop: 50,000 migrants released; few report to ICE

A law enforcement officer walks to meet migrants crossed the Rio Grande River illegally last month. Photo: Brandon Bell/Getty Images

About 50,000 migrants who crossed the southern border illegally have now been released in the United States without a court date. Although they are told to report to an Immigration and Customs Enforcement office instead, just 13% have shown up so far, Axios has learned.

Why it matters: The sizable numbers are a sign of just how overwhelmed some sectors of the U.S.-Mexico border continue to be: A single stretch covering the Rio Grande Valley had 20,000 apprehensions in a week. The figures also show the shortcomings of recent emergency decisions to release migrants.

2 hours ago - World

Scoop: Israel launches maximum pressure campaign against Ben & Jerry's

A Ben & Jerry's store in Yavne, Israel. Photo: Ahmad Gharabli/AFP via Getty

The Israeli government has formed a special task force to pressure Ben & Jerry's ice cream and its parent company Unilever to reverse their decision to boycott Israeli settlements in the West Bank, Israeli officials tell me.

Why it matters: The Israeli government is concerned the move by Ben & Jerry's will encourage other international companies to take similar steps to differentiate between Israel and the West Bank settlements. A classified Foreign Ministry cable, seen by Axios, makes clear the government wants to send a message.