The Time (7/13, Sifferlin) "Healthland" blog reports that "a new review published in the Cochrane Library suggests that there's no good evidence that" electric "fans help during a heatwave." The devices, "unlike air conditioning...don't actually cool the air, but bring in cooler air from outside if placed near a window." This "backfires, however, when air temperatures rise over 95°F - using an electric fan when it's that hot can actually increase your body's heat stress by blowing air that is warmer than the ideal body temperature over your skin." The blog points out that "the U.S. Centers for Disease Control and Prevention (CDC) recommends electric fan use only when temperatures are below the 90s."
WebMD (7/13, Boyles) reports that although "the review found little evidence of health harms linked to the use of electric fans among people without air conditioning, researchers concluded that better studies are needed to fully understand their impact during heat waves."
HealthDay (7/13, Preidt) reports that review co-author Katie Carmichael said in a news release that "Our review does not support or refute the use of electric fans during a heat wave and people making decisions about them should consider the current state of the evidence base. They might also wish to make themselves aware of local policy or guidelines when making a choice about whether or not to use or supply electric fans."