As temperatures rise across the country, researchers are warning that mosquitoes are not only surviving the heat—they’re adapting to it. A new study from UC Berkeley's School of Public Health finds that mosquitoes are extending their range and may thrive in areas once considered too hot or too cool for them.

This shift is increasing the risk of mosquito-borne diseases like West Nile virus, dengue fever, and chikungunya—even in regions where these illnesses were once rare.

“Many models assumed mosquitoes would flee heat, but they’re showing signs of adapting instead,” said lead researcher Lisa Couper.

Why It Matters:

• Longer mosquito seasons mean more chances for disease transmission
• New regions—including higher altitudes and latitudes—are at risk
• Mosquitoes as vectors can spread viruses to people and heartworm to pets

Most mosquitoes do not carry disease, but those that do can cause serious illness, including encephalitis and, in rare cases, death.

What You Can Do:

✔️ Eliminate standing water weekly
✔️ Use insect repellent with DEET or other EPA-approved ingredients
✔️ Report mosquito activity or dead birds to your local vector control agency
✔️ Stay informed about local risks, especially during peak season

To learn more or take action, visit comptoncreekmad.org.