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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

Updated 5 hours ago - Politics & Policy

Omicron dashboard

Illustration: Brendan Lynch/Axios

  1. Health: Pfizer and Moderna boosters overwhelmingly prevent Omicron hospitalizations, CDC finds — Omicron pushes COVID deaths toward 2,000 per day — The pandemic-proof health care giant.
  2. Vaccines: The case for Operation Warp Speed 2.0 — Starbucks drops worker vaccine or test requirement after SCOTUS ruling — Kids' COVID vaccination rates are particularly low in rural America.
  3. Politics: Biden concedes U.S. should have done more testing — Arizona says it "will not be intimidated" by Biden on anti-mask school policies — Federal judge blocks Biden's vaccine mandate for federal workers.
  4. World: American Airlines flight to London forced to turn around over mask dispute — WHO: COVID health emergency could end this year — Greece imposes vaccine mandate for people 60 and older — Austria approves COVID vaccine mandate for adults.
  5. Variant tracker

Arizona governor sues Biden administration over COVID funds tied to mandates

A teacher prepares a hallway barrier to help students maintain social distancing at John B. Wright Elementary School in Tucson, Arizona, on Aug. 14, 2020. Photo: Cheney Orr/Bloomberg via Getty Images

Arizona Gov. Doug Ducey (R) filed a lawsuit Friday against the Biden administration for ordering the state to stop allocating federal COVID relief funds to schools that don't comply with public health recommendations such as masking, the Arizona Republic reports.

Why it matters: The Treasury Department said last week that the state would have to pay back the money if Ducey does not redesignate the $173 million programs to ensure they don't "undermine efforts to stop the spread of COVID-19."

Federal judge blocks Biden's vaccine mandate for federal workers

President Biden speaking from Eisenhower Executive Office Building on Jan. 21. Photo: Yuri Gripas/Abaca/Bloomberg via Getty Images

A federal judge in Texas blocked the Biden administration from enforcing its coronavirus vaccine mandate for federal workers on Friday, citing the outcome of last week's Supreme Court ruling that nullified the administration's vaccine-or-test requirement for large employers.

Why it matters: It's a blow to President Biden's efforts to increase the U.S.' vaccination rates, though much of the federal workforce has already been vaccinated against the virus.