Article: Sinkholes are often triggered by weather phenomena, such as a heavy rainstorm. Once a sinkhole has formed, though, it can continue to grow, as further portions of limestone or other carbonate rocks fall away. As long as a sinkhole continues to grow on a day-by-day basis, do not attempt to fill it in. Once the sinkhole has stopped growing and remained the same size for a few days, you can fill it in. Only relatively small, shallow sink-holes can be filled by homeowners. Take a pole or stick (even a tree branch would do), and probe around in the sinkhole. Note how deep and wide it is.  Exercise caution when walking around the edge of the sinkhole! The ground can be very unstable, so take care not to fall. Do not attempt to fill in a sinkhole larger than 3 feet (0.91 m) in diameter. Large sinkholes can be deep and potentially dangerous. If the sinkhole is deeper than chest height, do not step down inside of it. Deep sinkholes, and holes with steep walls, pose a high risk of collapse. If you’re concerned about working in and around a sinkhole, or if you think that the sinkhole is too large for you to fill, it’s time to call professionals. Use Internet resources to find a local landscaping company, and explain that you’re hoping to have a sinkhole on your property filled in.  Landscaping companies will have more experience in dealing with this phenomenon than the average homeowner. When dealing with very large sinkholes, you’ll need to contact local authorities in the city or county in which the sinkhole has appeared.
What is a summary of what this article is about?
Monitor the hole to see if it grows. Probe the size and depth of the sinkhole. Call a professional landscaping company.