If nothing else, encourage your horse to lower his head to the ground. Keep your hat on and turn your back to the storm, just as horses do. If there is heavy rain, rising water may be the risk, even if the storm is distant. Do not get into streams, dry waterways, ditches or low ground. Stop, dismount and wait out the storm.
Many accidents happen when people keep moving when it is wet and visibility is low.
Be sure the safety chains are not touching the ground. Get in the tow vehicle. The important thing is to be sure no part of the tow vehicle or trailer is close to or touching the ground, including, chairs, lead ropes and buckets. More riders are lost in local thunderstorms than in hurricanes or tornadoes. Stay alert to the weather and take prompt action when a storm is coming.