The Pennsylvania Department of Health (PA DOH) has released a Health Alert Network Advisory regarding harmful algal blooms (HABs) throughout Pennsylvania’s water bodies during the warmer months. Exposure to HABs can cause sickness in animals and humans so you need to follow waterbody advisories or closures, stay out of water that is discolored, smells bad, or that has the presence of a visible foam, algal mats, or a paint-like appearance. Healthcare providers should assess for possible HAB exposures when caring for patients’ symptoms following recreational water activities. Report potential HAB exposures or illnesses. Report a suspected HAB or for additional information contact the PA DOH.