Well, it's a little late now, but for the future, I would suggest implementing a certified wildscape program in your yard. These may sound "wild" but even people in most HOA's can do this! You can get your yard certified wildscape easily! www.tpwd.state.tx.us
Contact the City of Dallas and explain to them that you are in the process of creating a wildscape habitat for certification and that it is imperative that no pesticides be used any where around it. This will (possibly) keep them from spraying on your street, maybe your whole block.
If enough people would speak up and let their city know that spraying for mosquitoes is not only useless and wasteful, but it is also harmful to animals, including humans (especially those with respiratory ailments)! Furthermore, it actually has the opposite effect. The time of day they spray is when mosquitoes are not active. The toxic spray kills the insects that eat mosquitoes. Less predators = more pests. Nature hates a vacuum.