Sigh. Here we go again.
Over the years, I have found that little league umpires (baseball, soccer, football, doesn't matter) are extremely reluctant to call a game for weather no matter how dangerous conditions are. I remember getting into a shouting match with an umpire during son Brandon's little league game as extremely dangerous and frequent cloud-to-ground lightning was approaching and had gotten within three miles.
Now, we have a video of a little league game continuing as tornado sirens sounded last week. That is no surprise to me.
My experience is there is a macho thing going on. Umpires and referees don't want to look like wimps by calling the games due to weather. Yet, lightning has been known to cause multiple fatalities in a single game.
Here is some lightning safety information from AccuWeather. NOAA has specific lightning safety information for Little League. Please take it to heart as we get into the heart of junior outdoor athletics.