(NAFB.com) – A recent study finds that drought can lengthen heat waves if these two features occur at the same time. This connection is familiar to anyone who has labored through a blistering hot day during a dry spell; however, the quantifying of this drought-heat wave relationship is noteworthy, nonetheless. A NOAA/NIDIS news release on this project stated that “researchers examined the influence of drought on heat wave intensity, duration, and human exposure to extreme heat using air temperature, soil moisture, and soil temperature observations from across the country.” Research team members found that drought increased the average duration of heat waves by 13 to 48 hours at most of the weather stations included in the study. Nationally, heat waves during drought had an average of about nine more hours of extreme heat compared to heat waves that occur in non-drought conditions. Research results were recently published in the Journal of Applied Meteorology and Climatology.