Heat wave duration has increased significantly in 29 of these locations, the length of the heat wave season in 44, and intensity in 17 (see Figure 2). Of the 50 metropolitan areas in this indicator, 46 experienced a statistically significant increase in heat wave frequency between the 1960s and 2020s.During the 2020s, the average heat wave has been 2.3☏ above the local threshold (see Figure 1). During the 1960s, the average heat wave across the 50 cities in Figures 1 and 2 was 2.0☏ above the local 85 th percentile threshold. Heat waves have become more intense over time.Timing can matter, as heat waves that occur earlier in the spring or later in the fall can catch people off-guard and increase exposure to the health risks associated with heat waves. The average heat wave season across the 50 cities in this indicator is about 49 days longer now than it was in the 1960s (see Figure 1).This is about a day longer than the average heat wave in the 1960s (see Figure 1). urban areas has been about four days long.
In recent years, the average heat wave in major U.S.Their frequency has increased steadily, from an average of two heat waves per year during the 1960s to six per year during the 2010s and 2020s (see Figure 1). Heat waves are occurring more often than they used to in major cities across the United States.
0 kommentar(er)
