It's spring in Baltimore! And as the last of the snows melt away and the flowers bloom, we need to start thinking about preparing for the summer's heat. By retrofitting your home, you can help keep the higher temperatures and humid air out, and keep it feeling like spring all year round. Sponsored by Retrofit Baltimore, a project of the non-profit Civic Works. 7 to 8 p.m., Govans Presbyterian Church. For more information, visit www.retrofitbaltimore.org/.