Transcript for Florida Families Threaten to Sue If Subjected to Zika-Fighting Mosquito Experiment
The flooding covering 12,000 square miles. The forecast expected to improve tomorrow. And a new case confirmed of the zika virus tonight. At least 359 cases in 41 states. And now, health officials with a controversial plan to keep zika from spreading. A key west community part of the experiment, and it's outraged. Here's Steve osunsami. Reporter: Families in this neighborhood outside key west tonight are beyond upset. We don't want to be lab rats. Reporter: Telling us they'll sue if the government allows a british company to release millions of genetically modified male mosquitoes near the their homes in an effort to fight the zika virus. If this is allowed to move forward, we won't be the only place they target to test. Reporter: The scientific community admits it's an experiment, but says it could give authorities a good way to kill the mosquitoes that can carry zika and other diseases. The genetically modified male mates with the wild female, and the offspring does not develop into an adult, it dies before adulthood. Reporter: The signs in nearly every yard say it clearly, the families give "No consent." Most of the new bugs will quickly die, but they're still worried because a small amount of these man-made mosquitoes will be the females that bite. Their online petition is now 166,000 strong. But the CDC, the fda, and even local officials say this is safe. And tonight, researchers are sharing this alarming map. Areas around the world where conditions are right for zika to thrive. More than 2.2 billion people at risk. County officials here have agreed to hold a vote in the fall but say they may still move forward no matter the results. And if not here, somewhere else. Tom?
This transcript has been automatically generated and may not be 100% accurate.