The death toll from a 7.7-magnitude earthquake one week ago that struck Myanmar rose to 3,354 people as millions have been made homeless and are in need of medical care.

Extreme heat and heavy rain in Myanmar could cause disease outbreaks among earthquake survivors camping in the open, global aid bodies warned on Thursday.

B ANGKOK — The death toll from the massive earthquake that hit Myanmar nearly a week ago rose Thursday to 3,085 as search and rescue teams found more bodies, the military-led government said, and humanitarian aid groups scrambled to provide survivors medical care and shelter.