Las Vegas-area officials are launching an “April Pools Day” drowning prevention program timed to highlight the start of the warm weather swim season. The Southern Nevada Child Drowning Prevention Coalition, elected officials and firefighters from Clark County, Las Vegas, North Las Vegas, Henderson and Boulder City wll mark the start of the awareness effort Friday. After a news conference at the Desert Breeze Aquatic Facility southeast of Las Vegas, firefighters plan to fan out in several neighborhoods to distribute advisory materials at homes and apartment complexes with pools. Officials say there are more than 103,000 residential swimming pools in Clark County. The Southern Nevada Health District tallied eight drownings and 33 near-drownings in 2010 involving children 14 years old or younger, and two swimming pool incidents so far this year.