Resignation comes after reports of people using connections to jump the queue and receive COVID-19 jabs.
It was not immediately clear what caused the blasts but a majority of attacks in recent months have been sticky bombs.
Demonstrators in both nations may have been beaten by the system but they are not ready to concede defeat.
Declaration unlocks federal funding and aid for Texas, where winter storm has left millions without power and water.
Joe Biden’s first meeting with foreign head of government since becoming president will be with Canada’s Justin Trudeau.

A dispute about delayed elections led to gunfire in Mogadishu on Friday.
US and UN call on Malaysia to halt the deportation of 1,200 Myanmar nationals saying it could put their lives at risk.