We're having a bit of an ozone air pollution issue in the League City area late this afternoon. This is potentially relevant to folks who are physically sensitive to this kind of thing.
|Screengrab from http://www.tceq.texas.gov/cgi-bin/compliance/monops/select_curlev.pl?region12_cur.gif|
Here's a screengrab of the key to interpreting the colors:
|Screengrab courtesy of TCEQ|
|Example of a physical warning sign in the greater Houston area.|
Screengrab from Wikipedia.