tanker carrying fracking wastewater struck by lightning in greeley , colorado , about 1 pm friday .
fracking water contains traces of gas and petroleum , causing the tanker to explode .
other trucks also exploded as a result of fires at the facility , owned by ngl energy partners .
firefighters had to wait for the fires to subside before entering , because they were ignited by oil .
there were no injuries , but the facility appears destroyed .
the site is used to pump fracking wastewater into the ground .
storms swept from the upper midwest to the southeast on friday and saturday .
north texas was placed on a severe thunderstorm warning saturday night , particularly fort worth and dallas .
the academy of country music 's party for a cause festival at globe life park , arlington , threatened .
houston suffered serious floods friday night as rivers and bayous overflowed from the rain .