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 confirmed death toll from last week’s massive earthquake in Myanmar has risen to 3,455, as U.N. agencies and foreign aid donors ramp up their emergency relief efforts.

Critical infrastructure - including bridges, highways, airports and railways - across the country has been damaged, slowing humanitarian efforts.