Severe flooding in South Texas has left at least four people dead and forced emergency crews to rescue hundreds of people from rising waters. State officials say the Rio Grande Valley endured more than half of a year's worth of rain within the span of 48 hours last week, leading to submerged roads and waterlogged vehicles.

A large part of South Texas is reeling from life-threatening flooding that began overnight and continued into Friday morning.

Extreme floods hit southern Texas throughout last week, caused by what reports say was 'over half a year's worth of rain' dropping onto some areas in the state from Wednesday to Friday. Flooding persisted on March 28,