KERRVILLE, Texas (AP) — Over the last decade, an array of Texas state and local agencies missed opportunities to fund a flood warning system intended to avert a disaster like the one that killed dozens of young campers and scores of others in Kerr County on the Fourth of July.

CNN’s Ed Lavandera is on the ground in Texas as volunteer search and rescue teams look for those still missing after floodwaters swept through the Guadalupe River area.

The data also highlights critical risks in other areas along the Guadalupe River in Kerr County, revealing more than twice as many Americans live in flood prone areas than FEMA's maps show.

The warning is in effect until 9 a.m. for Boston and several communities south of the city, according to the National Weather Service.

Communities south of Boston have seen as much as 4 and a half inches of rain, with a flash flood warning still in effect.

Recent historic flooding has devastated communities in central Texas, and a flash flood in eastern Oklahoma forced a summer day camp to evacuate. For many, the possibility of flooding in one's community is now top of mind.

A "considerable" flash flood warning has been issued in Boston as heavy, life-threatening rain pounds the city and areas to the south.

On Thursday at 6:01 a.m. the National Weather Service released a flash flood warning in effect until 9 a.m. for Bristol, Middlesex, Norfolk, Plymouth, Suffolk and Worcester counties.

Recent flash flooding in Texas​, New Mexico​ and North Carolina​ is highlighting the extreme danger of these natural disasters and the need to be prepared.