On  Wednesday, December 28, fog on the Zhengxin Huanghe bridge in  Zhengzhou, China, became so heavy that it caused cars to continuously  crash, leading to a massive 200-car pileup. Sadly, one person was killed and countless people were left injured and stranded, according to Reuters.  
The  heavy fog had reduced visibility to less than 200 meters (656 feet) at  certain points, according to local meteorologists. However, a video from  someone walking through the wreckage shows visibility that looks barely  farther than a few dozen meters. Making matters even worse, emergency  services couldn't reach many of the injured drivers and passengers, who  were trapped in their cars. Eleven fire trucks and 66 rescue personnel  were sent to help.
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