How to deal with the low temperature even on cloudy days after tomato planting?

It is very troublesome to encounter continuous rainy and cold weather, and a little carelessness will cause great losses. Current proposal: 1. Strengthen heat preservation measures, such as auxiliary heating when the temperature is below 8 degrees. 2. Pay attention to the illumination, and cover the plants with straw mats or insulation quilts at noon every day, so that the plants can receive 1-2 hours of illumination to ensure normal growth. It is best to fill the light with LED or agricultural sodium lamp. 3, the weather turns fine, anti-flash seedlings. After the rain and snow, when the weather turns fine, don't uncover the straw mat (insulation quilt) too quickly and too violently. Always observe the growth of plants. Once wilting occurs, cover the straw mat or insulation quilt in time and spray warm water on the page to save the fire. When it returns to normal, uncover the straw mat again. If it is serious, it will be repeated several times.