Road safety takes a hit on really hot days. Research from around the world reveals that when temperatures climb above 30 degrees Celsius, the risk of accidents doesn’t just rise—it jumps sharply. Pedestrians face more than double the injury risk during extreme heat, cyclists see injuries increase by nearly 80%, and motorcyclists by about 50%. Drivers in cars experience a much smaller rise in danger. Overall, on scorching days, the safety risks climb by roughly 15%, with the most vulnerable road users—the ones exposed to the sun—bearing the brunt of it. Along with more crashes, the chances of injuries and fatalities also rise.

So, why does heat make the roads more dangerous, and why do these risks sometimes stick around? Studies suggest it’s a mix of being physically exposed to the heat and how it messes with human performance. Pedestrians, cyclists, and motorcyclists are out in the open, often exerting themselves, which ramps up their risk. People inside cars, shielded from the heat, don’t see as big a jump. Heat also brings on driver fatigue, distraction, sleepiness, and even illness. These problems don’t always disappear when the temperature drops; they can linger for days after a heatwave, likely because of ongoing sleep problems and tiredness building up over time.

Managing this extra risk means cutting down on exposure. One effective way is offering flexible work options during heatwaves, which can keep people off the roads altogether. Being aware of the added danger heat brings can also make a difference—just knowing that hot days are riskier encourages us to be more careful behind the wheel or on foot.

Source: https://theconversation.com/roads-can-become-more-dangerous-on-hot-days-especially-for-pedestrians-cyclists-and-motorcyclists-272995