Metro Vancouver is warning its residents and businesses that water usage for lawns will be restricted beginning next month. Starting May 1, seasonal regulations that limit lawn watering to once per week will come into effect in an effort to conserve the region’s drinking water for the coming hot and dry months. “We are increasingly seeing variable weather patterns due to climate change, and we can’t always count on rainfall to replenish our water supply when we need it,” said George V. Harvie, Metro Vancouver board of directors chair.