Fast Facts:

• Over 3 inches of rain recorded in 30 minutes in New Braunfels, Texas.
• Numerous high-water rescues reported in San Antonio area.
• Houston now in Level 3 out of 4 flash flood threat.

SAN ANTONIO – Roads are closed, and first responders are conducting high-water rescues in the San Antonio area after relentless rain in Texas led to numerous reports of flash flooding, with more rounds of heavy precipitation on the way Thursday.

Several inches of rain fell across San Antonio and surrounding communities in a short period of time, making the situation even more dangerous.

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“In San Antonio proper, we’ve picked up over 5.5 inches of rain in three hours,” FOX Weather Meteorologist Britta Merwin said. “These are very aggressive rain rates.”

More than 3 inches of rain fell in the New Braunfels area, northwest of San Antonio. A video recorded in Santo, Texas, shows significant flooding taking place as the heavy rain fell.

As of early Thursday morning, the San Antonio Fire Department had responded to more than 10 high-water rescues, and countless roads were closed due to flooding.

“It’s incredibly important not to travel,” Merwin continued. “San Antonio does have a robust system where they close roads, especially in these lower-level parts of the interstate.”

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The FOX Forecast Center said the heavy rain and severe weather threat that began Tuesday in Texas is likely to continue through at least the rest of the workweek.

A moist atmosphere, with moisture levels running well above average for early June, is what’s contributing to the threat, with strong instability and plentiful storm energy aiding in severe thunderstorm development.

As winds remain light in the atmosphere, storms that develop will be slow-moving, thus producing high rainfall totals and increasing the flood potential.

The FOX Forecast Center said that a stalled cold front will act as a focus point for rounds of heavy rain and storms through the rest of the week, including in areas of the Red River Valley that are already quite saturated from historic rain earlier in the spring.

The flood threat will shift to the east, putting the Ark-La-Tex region at risk on Thursday. This includes cities from Houston to Little Rock in Arkansas.

On Thursday, NOAA‘s Weather Prediction Center placed the Houston area in a Level 3 out of 4 threat of flash flooding, with the threat shifting into Arkansas on Friday.

Most of the state has been placed in a Level 2 out of 4 flash flood threat.