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

BANGKOK — The death toll from the earthquake that hit Myanmar nearly a week ago rose Thursday to 3,145 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.

Myanmar is already dealing with a protracted civil war and economic upheaval. And now many places are in ruins as a result of the earthquake's destruction of houses, bridges, and dams. Now, the 7.7-magnitude earthquake struck central Myanmar on March 28 has led to over 2,