And also developing tonight. Grand Prairie just issued a do not use water advisory. This map shows the area affected. It is for anyone who lives north of I 20 Grand Prairie. Officials say a foaming agent was found in the water supply. Residents are told not to use the water in any way except for flushing. That means do not touch it, do not use it even if it's boiled until further notice, the city is working on providing bottled water.