More than 30,000 residents of the nation’s fourth-largest city were expected to be left temporarily homeless by Hurricane Harvey, which became the most powerful hurricane to strike Texas in more than 50 years when it came ashore on Friday.

Roughly 280,000 customers remain without power along the Texas’s coast and in the Houston area on Monday, according to reported outages by the state’s investor-owned utilities.

With the Bayou Bayou river surging, floodwaters rose a dozen feet or more in some places near downtown Houston. Here are some before-and-after photos to give context to the record rainfall: