Country star Miranda Lambert has stepped up her bid to help those recovering from Monday's (20May13) deadly tornado in Oklahoma by dispatching mobile pet rescue units to Moore to provide aid to injured animals. At least 24 people were killed when the natural disaster swept through the area, destroying homes and levelling buildings, including two elementary schools. The House That Built Me singer, who currently lives in Oklahoma with her husband Blake Shelton, a native of the state, has now pitched in to show her support by calling on veterinarians at MuttNation Foundation, which Lambert launched in 2009, to set up camp in the damaged town of Moore to care for the dogs and cats left injured or homeless. The temporary shelters arrived on Wednesday (22May13) and the Grammy Award winner is glad she was able to do her part - in a post on Twitter.com, she writes, "I'm so proud that MuttNation Can help even a little." Lambert isn't the only one to provide aid to those hardest hit by the tornado - Shelton is in the process of organising a star-studded benefit concert to help residents rebuild their community, while actress/singer Kristin Chenoweth has started selling special T-shirts online to raise money for families and their pets, and Carrie Underwood has donated $1 million (£645,000) to the Red Cross' relief effort.