Notable Disasters occurring in the week after April 15
April 15, 1865Washington D.C.Abraham Lincoln Assassinated
April 18, 1906San Francisco, CASan Francisco Earthquake700-3,000 killed
April 15, 1912North AtlanticTitanic Sinks>1,500 killed
April 20, 1914Ludlow, COLudlow Massacre20 killed, including 12 children
April 15, 1989Sheffield, EnglandHillsborough Disaster96 killed, 766 injured
April 19, 1993Waco SiegeWaco, TX76 killed
April 19, 1995Oklahoma City, OKOklahoma City Bombing168 killed, including 19 children
April 20, 1999Littleton, COColumbine HS Shooting15 killed, 21 injured
April 16, 2007Blacksburg, VAVirginia Tech Shooting32 killed, 17 wounded
April 20, 2010Gulf of MexicoBP Oil Spill11 killed, 17 injured
April 15, 2013Boston, MABoston Marathon Bombing3 killed, 250 injured
April 17, 2013West, TXWest Fertilizer Co. Explosion15 killed, 160 wounded
April 15, 2019Paris, FranceNotre Dame Cathedral Fire3 first-responders injured
April 17, 2025Tallahasee, FLFlorida State University Shooting2 killed, 6 injured
I think we should rather Beware the Ides of April.