ONTARIO — Two years after a destructive derecho tore across eastern Ontario, one of the hardest-hit areas is taking the next step toward revitalizing its forests: planting new trees to replace the ones destroyed in the storm. The derecho struck the region, bringing winds of up to 190 km/h. Hydro Ottawa said the storm knocked out more than 500 hydro poles. The violent storm also downed innumerable trees, particularly softwood species such as red and white pine. Last year, various levels of government joined the South Nation Conservation Authority east of Ottawa to develop a forest recovery program to address the severe damage.  …A derecho is a fast-moving thunderstorm known for causing widespread wind damage. Unlike the rotating winds in a hurricane or tornado, a derecho’s winds blow straight. Caroline Goulet, a forester with the conservation authority, said the derecho was not “consistent in regards to the way and the type of force that it hit.”