Climate change allowed for record-breaking heat in the West during October’s historic temperatures | Nature

Human-amplified local weather change is making it extra seemingly that excessive heat lasts longer into fall, as record-breaking temperatures for the month of October blanket a lot of the western U.S.

An unprecedented late season heat wave is in impact in the West, with October temperatures damaged in main cities, a number of of that are nonetheless experiencing triple-digit heat.

On Tuesday, Palm Springs reached 117 levels Fahrenheit; Phoenix hit 113 levels whereas Tucson received as much as 105 levels.

Elsewhere in California, San Jose broke its each day file at 100 levels; Oakland reached 96 levels; Napa hit a each day file at 99 levels; and downtown San Francisco reached 94 levels, the hottest October temperature in the metropolis in two years.

Some areas are anticipated to expertise even hotter circumstances on Wednesday. Heat alerts have been issued all through California, Arizona and Nevada. Excessive heat warnings are additionally in place for San Francisco, Las Vegas and Phoenix, and a heat advisory has been issued in Los Angeles.

The geographic vary of the file heat is anticipated to develop eastward, together with Colorado, the place Denver might attain a record-high of 90 levels.

If Denver reaches the 90s, it will likely be the newest 90-degree temperature ever recorded in the metropolis, information present.

The file heat is anticipated to final into the weekend for most of the West.

Fire hazard can be excessive from California to Montana as a result of the dry, sizzling and windy circumstances.

Human-amplified local weather change is growing the frequency and depth of maximum heat occasions, in response to local weather scientists.

The common variety of heat waves that main U.S. cities expertise every year has doubled since the Eighties, in response to the federal authorities’s Fifth National Climate Assessment, launched final November.

The record-breaking temperature for the month of October set in Palm Springs and Phoenix on Monday had been made at the very least 5 instances extra seemingly by human-amplified local weather change, in response to Climate Central’s Climate Shift Index.

Global warming can be serving to gas excessive heat that persists properly into the fall season.

Fall nights have warmed by 2.7 levels Fahrenheit, on common, from 1970 to 2023 in 212 U.S. cities, in response to a Climate Central evaluation.

Fall warming is widespread throughout the contiguous U.S., and most intense in the Southwest, in response to a Climate Central evaluation.

ABC News' Matthew Glasser and Daniel Peck contributed to this report.