LAS VEGAS (KLAS) — As if it isn’t enough that triple-digit temperatures are baking the Las Vegas valley and surrounding areas, the warning for extreme heat has been extended two more days. It will now end on Thursday at 8 p.m.

The National Weather Service has extended the excessive heat warning twice since it started on Tuesday, Aug. 30. The warning was supposed to end Sunday but was extended to Tuesday and then Thursday.

A National Weather Service graphic showing the areas where there is an excessive heat warning. (Credit: NSW)

The high temperature in Las Vegas is expected to reach 111 Tuesday. The normal high temperature for this time of year is 99 degrees.

The excessive heat warning includes Las Vegas, Lake Mead recreational area, southern Clark County, Nye County, southeast California, the Colorado River Valley, and Death Valley National Park. The dangerously hot conditions could include record-high temperatures in some of those areas.

Valley temperatures will remain in the triple digits through Friday before cooling off to a more normal range.

Even though the outside temperature can measure to a certain degree, it can feel hotter in some areas. Earlier this year, on June 10, the temperature reached 109 setting a new record for that date. In fact, NASA thermal sensors in space generated a map of the ground surface temperatures in Las Vegas for that day showing them as high as 122 degrees in unshaded areas. As expected, the hottest areas were streets where the pavement absorbs the heat.

The darker the map, the hotter the temperature on NASA’s heat index map of the Las Vegas valley on June 10, 2022. (Credit: NASA)

The National Weather Service urges people to take the heat seriously by keeping hydrated, eating, dressing in lightweight clothing, and taking breaks to cool down if they are not in air conditioning. Most importantly, recognize the symptoms of heat illness which can lead to heat stroke and death.

According to Clark County, 124 people died during local heat waves in 2020 but by the following year, 2021, 250 people died. So far, there have been 74 heat-related deaths in 2022 and several cases are still pending.

If this summer feels hotter than usual, it actually isn’t.

  • There have been 71 days where the temperature was at least 100 degrees (The normal average is 78 days through September) (This is a tally as of Sept. 5, 2022)
  • There have been 38 days of 105 degrees (40 days is the average through September)
  • There have been 7 days of 110 degrees or more (9.5 days is the average for the summer)

So far, the official hottest temperature of this summer was 112 degrees which occurred twice in July which is the hottest month for southern Nevada. Of course, that’s the official reading from Harry Reid International Airport. Unofficially, it was likely hotter in other areas of the valley.

Climate Central, which is a non-profit independent group of scientists and communicators who research the changing climate, named Reno and Las Vegas the fastest-warming cities in the U.S.

Climate Central reports Las Vegas has seen an increase of 5.8 degrees in summer temperatures since 1970 and it’s not alone. A study of 246 U.S. locations showed that 96% have seen an increase in the average summer temperatures.

According to NASA, eight of the top 10 hottest years on record for the world have happened in the last decade.

The cooler days of fall are still seven weeks away when summer officially ends on Sept. 22.