In some areas, the rain has come down at a rate of three inches per hour. In one area of Sulphur, rainfall was recorded at 12 inches per hour.
The above from the Sulphur LA area.... It's hard to believe but it happens and thankfully it only does that for a portion of the hour. Or, in cases where I've seen it happen it will deluge you for a period of time then slack off, but it comes down so fast that it can't run off fast enough. In this flat land country that is what causes the flooding so rapidly.
Send it to New Mexico please, I've had no measurable precipitation for months. Humidity at 10% for the last week.