As the road shook beneath him, Ko Zeyer sped past crumbled buildings, buckled roads and gaping sinkholes toward his hometown of Sagaing, the epicenter of the most powerful earthquake to hit Myanmar in a century.

The official death toll from Myanmar’s earthquake disaster has surpassed 3,600, with more than 5,000 people injured and 160 still missing, as international rescue efforts wind down amid a relief effort hampered by extreme weather.