The New Milford Health Department issued a heat advisory Thursday.

The advisory, which was released in conjoined effort between the health department and the New Milford Senior Center, warns residents to take preventive measures to combat overheating on Thursday and Friday.

Seniors with respiratory illnesses are most vulnerable, the advisory press release said.

People are advised to wear light clothing, avoid strenuous activity, and huddle near air conditioning, the release said. If air conditioning is not available, people should remain on the lowest, coolest floor of their dwelling.

Senior center Director Carolyn Haglund also reminded seniors that the center is open to them from 8 a.m. to 4 p.m. if they want to stop by and cool off, the release said.

The senior center is located on 40 Main Street, New Milford.