This year's tick season has been extremely active, leading to a surge in ER visits because of tick bites, particularly in the Northeast. This year's figures are the highest since 2019, according to the Centers for Disease Control and Prevention. Story continues after photo gallery.

The CDC reports the highest number of tick bites across the United States in five years. Experts say climate change is contributing to the increase in tick populations and diseases they carry, such as Lyme disease.

This season is called the "summer of the tick." Experts say this unusually hot summer plus climate change are leading to an uptick in ticks. Doctors say the increase in ticks has led to more tick bites and trips to hospital emergency rooms,