[mrb]

I used this site to check wind conditions during the 2015 Tianjin explosions. I was 90 miles away (Beijing) and was considering leaving the country had wind been blowing in the wrong direction. At the time the risk of the hazardous chemicals released by the explosions was completely unknown, so wind conditions were the only objective piece of information I could base my decision on. Fortunately the wind was blowing north/east.