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JEFFERSON CITY, Mo. (AP) - Several hundred gun-rights advocates rallied at the state Capitol as the Missouri House voted to allow certain school personnel to carry concealed weapons in school buildings.

The House voted 115-41 to send the measure to the Senate Thursday.

The Missouri Sports Shooter Association held a previously scheduled rally in the Capitol rotunda while the House was debating the bill. Many lawmakers, both Republicans and Democrats, spoke at the event and promised to continue to push for more gun rights.

The House bill would also lower the minimum age required to carry concealed weapons and allow firearms less than 16 inches to be openly carried by people with valid permits.

Flooding is the major concern after more than two inches of rain has fallen in the St. Louis area in just the past day.

Jefferson County officials have issued an emergency evacuation advisory. They are encouraging anyone near a body of water to immediately seek higher ground. 

Residents of De Soto, Missouri reporting that several city buildings, including the fire department, are flooded and roads are impassable. Emergency crews continue their work to rescue people trapped in their cars.

A section of I-70 flooded near Highland, Illinois, and forced authorities to close an the exit ramp onto Route 143.

In the more immediate metro area, there are reports of flooding on low-lying roads, including Wild Horse Creek Road in West County. 

KTRS News spoke to MoDOT about some tips to keep you safe on the roads. If it seems like a water-covered roadway is shallow enough to drive across--don't do it! Do not drive through flooded areas. And the best way to avoid hydroplaning is to slow down.

MoDOT also has up-to-date road information here.

The United Way is asking for help for another volunteer organization working on flood relief.

AmeriCorps volunteers working in Clarksville, MO need a small volume pump. If anyone/company can help with this, please call AmeriCorps in St. Louis at 314-772-9002.