On Sunday night, four planes returned to the skies over Dallas County to spray for mosquitoes carrying the West Nile Virus.
Dallas County hoped to finish the round of spraying 220,000 acres Sunday night and hit all the areas again Monday and Tuesday night. The land includes the cities of Dallas, Carrollton, Coppell, Garland and Grand Prairie.
According to a Sunday afternoon news conference, two planes started in Carrollton and two others in Garland. County leaders said pilots crisscrossed the county until they are finished.
Dallas Mayor Mike Rawlings said he has looked at some preliminary reports and it looks like the chemical is doing its job of killing mosquitoes. But people still need to take matters into their own hands.
"This is a little bottle cap," Mayor Rawlings said. "This could be a bottle cap full of death because that's what can breed West Nile viruses. And we need to make sure any amount of standing water is taking out of backyards and front yards."
On Saturday, Dallas County Health Department Director Zach Thompson, who's in charge of the ground game, said the county will use spray trucks from the state through the end of the month for areas that opted out of the aerial spray.
"I think between the two we'll effectively be able to address the West Nile virus outbreak here in Dallas County," said Thompson.