Here in Kentucky, black widows are fairly common.
My nephew works for the water department, and he had the job of meter reader for awhile.
He said it was pretty common to see them in the meter boxes, that are buried in the ground around here.
he got bit once, it hurt him pretty bad for a few days, he said it was like a very bad wasp sting. But it didnt kill him or have any long lasting effects.
We have a much more dangerous spider here, it's called the brown recluse, AKA fiddler or fiddle back spider.
The fiddler doesnt spin a web like the widow, it hunts its food, which makes it much more dangerous, because the fiddler likes to climb into shoes and clothes to get in the warm dark places.
If you have fiddlers in the house, you must always check your shoes before putting them on, and check the bed covers before climbing in.
The fiddler wont kill you, but the area it bites begins to rot out. It is a long painful journey and leaves some pretty bad scars.